Hyperloop

The Hyperloop is a conceptual high-speed transportation system designed for both passenger and freight transit. Entrepreneur Elon Musk introduced this concept in a 2013 white paper, characterizing the hyperloop as a transport mechanism employing capsules that glide on an air-bearing surface within a low-pressure tube. Hyperloop systems fundamentally comprise three components: tubes, pods, and terminals. The tube constitutes a substantial, sealed, low-pressure environment, typically configured as an extended tunnel. Operating at atmospheric pressure, the pod functions as a passenger or cargo carrier, experiencing minimal air resistance or friction within the tube through magnetic propulsion; the initial design also incorporated a ducted fan for augmentation. Terminals are responsible for managing the arrival and departure of pods. Musk's original hyperloop proposal distinguished itself from conventional vactrains by utilizing residual air pressure within the tube to generate lift via aerofoils and propulsion through fans; nevertheless, numerous subsequent iterations adopting the "hyperloop" designation have largely adhered to the foundational principles of vactrain technology.

Hyperloop is a proposed high-speed transportation system for both passengers and freight. In 2013, the concept was published by entrepreneur Elon Musk in a white paper, where the hyperloop was described as a transportation system using capsules supported by an air-bearing surface within a low-pressure tube. Hyperloop systems have three essential elements: tubes, pods, and terminals. The tube is a large, sealed, low-pressure system (typically a long tunnel). The pod is a coach at atmospheric pressure that experiences low air resistance or friction inside the tube using magnetic propulsion (in the initial design, augmented by a ducted fan). The terminal handles pod arrivals and departures. The hyperloop, in the form proposed by Musk, differs from other vactrains by relying on residual air pressure inside the tube to provide lift from aerofoils and propulsion by fans; however, many subsequent variants using the name "hyperloop" have remained relatively close to the core principles of vactrains.

Elon Musk initially hinted at the hyperloop concept during a 2012 speaking engagement, where he characterized it as a "fifth mode of transport." On August 22, 2013, Musk published an alpha version white paper detailing the hyperloop's design, which featured reduced-pressure tubes, pressurized capsules supported by air bearings, and propulsion via linear induction motors and axial compressors. The white paper presented a hypothetical hyperloop route connecting the Los Angeles region with the San Francisco Bay Area, approximately paralleling the Interstate 5 corridor. However, certain transportation analysts disputed the cost projections outlined in the white paper, with some estimating that a hyperloop system would incur expenses several billion dollars greater than initially proposed.

Musk and SpaceX have actively promoted the hyperloop concept, encouraging collaboration from other companies and organizations in its technological development. In July 2019, a hyperloop system developed by the Technical University of Munich achieved a speed record of 463 km/h (288 mph) during a pod design competition hosted by SpaceX in Hawthorne, California. Virgin Hyperloop conducted the inaugural human trial in November 2020 at its Las Vegas test facility, attaining a maximum speed of 172 km/h (107 mph).

A European initiative aimed at standardizing "hyperloop systems" issued a draft standard in 2023.

Hyperloop One, a prominent and well-funded entity within the hyperloop sector, declared bankruptcy and ceased operations on December 31, 2023. Nevertheless, other companies persist in their efforts to advance hyperloop technology.

Historical Context

In July 2012, during a Pando Daily event in Santa Monica, California, Musk initially disclosed his contemplation of a "fifth mode of transport," which he termed the Hyperloop. This hypothetical high-speed transport system was envisioned to possess several attributes: weather immunity, collision-free operation, speeds double that of aircraft, minimal power consumption, and integrated energy storage for continuous 24-hour functionality. The designation Hyperloop was selected due to the system's intended operational characteristic of forming a loop. By May 2013, Musk had metaphorically described the Hyperloop as a "cross between a Concorde and a railgun and an air hockey table." By 2016, Musk further speculated that more advanced iterations of the system might achieve hypersonic velocities.

Between late 2012 and August 2013, engineers from both Tesla and SpaceX collaborated on developing a conceptual model for Musk's Hyperloop. An initial conceptual model of the system was subsequently published on the Tesla and SpaceX websites, outlining a potential design, operational principles, route, and cost structure for a hyperloop system. The alpha design proposed that pods would gradually accelerate to cruising speeds via linear electric motors, gliding on air bearings within tubes positioned either above ground on columns or underground in tunnels, thereby circumventing the complexities of grade crossings. During the 2010s, an ideal hyperloop system was projected to surpass existing mass transit modes in terms of energy efficiency, quiet operation, and autonomy. The Hyperloop Alpha was released as an open-source design. Musk solicited public feedback, encouraging individuals to "find ways to improve it." On April 4, 2017, the trademark "HYPERLOOP," pertaining to "high-speed transportation of goods in tubes," was granted to SpaceX.

On June 15, 2015, SpaceX announced its intention to construct a 1-mile-long (1.6 km) Hyperloop test track adjacent to its Hawthorne facility. This track was subsequently completed and utilized for testing pod designs submitted by third-party participants in a competition.

By November 30, 2015, numerous commercial entities and academic teams were actively developing Hyperloop technologies, leading the Wall Street Journal to declare that 'The Hyperloop Movement,' as some of its independent participants termed themselves, had surpassed its originator in scope.

The Massachusetts Institute of Technology (MIT) hyperloop team introduced an initial hyperloop pod prototype at the MIT Museum on May 13, 2016. This design incorporated electrodynamic suspension for levitation and eddy current braking.

In November 2020, Virgin Hyperloop conducted an initial low-speed passenger test involving two company employees, during which the unit attained a peak velocity of 172 km/h (107 mph).

The European Committee for Electrotechnical Standardization issued the inaugural technical standard for hyperloop systems in January 2023. Previously, in June 2019, Hardt Hyperloop showcased a Hyperloop lane switching mechanism, devoid of moving infrastructure components, at its Delft, Netherlands, test facility.

As of December 21, 2023, Hyperloop One, formerly known as Virgin Hyperloop, ceased its operational activities.

Theoretical Framework and Operational Principles

The antecedent vactrain concept shares similarities with high-speed rail systems, aiming to eliminate significant air resistance by utilizing magnetically levitated trains within evacuated or partially evacuated tubes. Nevertheless, the inherent challenge of sustaining a vacuum across extensive distances has precluded the construction of such systems. In contrast, the Hyperloop alpha concept was designed to function at approximately one millibar (100 Pa) of pressure, leveraging the residual air for levitation.

Preliminary Design Concept

The hyperloop alpha concept proposed operation through the propulsion of specialized 'capsules' or 'pods' within a steel tube maintained under a partial vacuum. According to Musk's initial design, each capsule would levitate on an air cushion, ranging from 0.02 to 0.05 inches (0.5–1.3 mm) thick, supplied under pressure to air-caster 'skis.' This mechanism is analogous to the levitation of pucks on an air hockey table, enabling speeds unattainable by conventional wheels. By eliminating rolling resistance and substantially reducing aerodynamic drag, the capsules could glide for the majority of their transit. Within the alpha design framework, an electrically powered inlet fan and an axial compressor positioned at the capsule's nose were intended to 'actively transfer high-pressure air from the front to the rear of the vessel.' This mechanism aimed to mitigate the accumulation of air pressure ahead of the vehicle, which would otherwise impede its velocity. A portion of this air was also to be diverted to the skis, providing supplementary pressure and passively enhancing lift through their aerodynamic profile.

Under the alpha-level concept, passenger-only pods were designed with a diameter of 7 feet 4 inches (2.23 m) and were projected to achieve a maximum speed of 760 mph (1,220 km/h) to ensure aerodynamic efficiency. ^{(Section 4.4)} The design stipulated that passengers would experience a peak inertial acceleration of 0.5 g, which is approximately two to three times the acceleration encountered by passengers in a commercial airliner during takeoff and landing.

Prospective Routes

Numerous routes have been suggested that satisfy the distance criteria for which hyperloop technology is theorized to offer enhanced transit times, specifically for distances under approximately 1,500 kilometers (930 miles). These route proposals encompass a spectrum from speculative announcements in corporate communications to detailed business cases and formal agreements.

Republic of Korea

In June 2017, an agreement was executed for the collaborative development of a hyperloop line connecting Seoul and Busan, South Korea. However, the project was subsequently suspended in early 2024 following the Korean government's withdrawal of public funding, citing concerns regarding the economic viability of the undertaking.

In April 2025, the government initiated a research project focused on developing maglev propulsion technology for the Hypertube, a proposed next-generation high-speed train system intended for the Seoul-Busan corridor.

United States of America

The route outlined in the 2013 alpha-level design document extended from the Greater Los Angeles Area to the San Francisco Bay Area. This conceptual system was envisioned to commence near Sylmar, situated south of the Tejon Pass, proceed northward along Interstate 5, and conclude near Hayward on the eastern shore of San Francisco Bay. The design document also illustrated proposed extensions to locations such as Sacramento, Anaheim, San Diego, and Las Vegas.

The route outlined in Musk's design has not commenced construction. A primary justification for this lack of progress is the proposed termination points on the peripheries of two significant metropolitan areas, Los Angeles and San Francisco. While this approach would yield substantial construction cost reductions, it would necessitate passengers traveling to or from downtown Los Angeles, San Francisco, or any location beyond Sylmar and Hayward, to transfer to an alternative mode of transport to complete their journey. Consequently, the overall travel duration to these destinations would be considerably extended.

A comparable issue currently impacts contemporary air travel, particularly on shorter routes such as LAX–SFO, where the actual flight duration constitutes a relatively minor component of the total door-to-door travel time. Commentators have contended that this scenario would substantially diminish the projected cost and time efficiencies of hyperloop technology when contrasted with the proposed California High-Speed Rail project, which is designed to serve central stations in both San Francisco and Los Angeles. For passengers commuting between financial centers, an estimated two-hour reduction in travel time is anticipated by utilizing the Hyperloop rather than driving the entire distance.

Furthermore, the cost projections for the proposed California route have faced scrutiny. In 2013, several transportation engineers asserted that the initial design's cost estimations were implausibly low, considering the extensive construction requirements and the dependence on nascent technological solutions. Consequently, the technological and economic viability of this concept remains unverified and is a topic of considerable ongoing discussion.

In November 2017, Arrivo unveiled a conceptual maglev automobile transport system intended to connect Aurora, Colorado, with Denver International Airport, envisioned as the initial segment of a broader network originating from downtown Denver. The associated contract indicated a prospective completion date for this inaugural segment in 2021. Subsequently, in February 2018, Hyperloop Transportation Technologies disclosed comparable proposals for a loop system linking Chicago and Cleveland, as well as another connecting Washington and New York City.

During 2018, the Missouri Hyperloop Coalition was established through a collaboration involving Virgin Hyperloop One, the University of Missouri, and the engineering firm Black & Veatch, with the objective of investigating a potential route linking St. Louis, Columbia, and Kansas City.

On December 19, 2018, Elon Musk presented a 2-mile (3 km) tunnel situated beneath Los Angeles. During the demonstration, a Tesla Model X traversed the tunnel on a designated track, distinct from a low-pressure tube system. Musk stated that the system's cost amounted to approximately US$10 million. He further elaborated, stating that "The Loop represents an incremental development towards hyperloop technology. The Loop is designed for intra-city transportation, whereas Hyperloop is intended for inter-city transit, operating at speeds significantly exceeding 150 mph."

The Northeast Ohio Areawide Coordinating Agency (NOACA) collaborated with Hyperloop Transportation Technologies to undertake a $1.3 million feasibility study. This study aims to develop a hyperloop corridor connecting Chicago, Cleveland, and Pittsburgh, envisioning America's inaugural multistate hyperloop system within the Great Lakes Megaregion. Substantial financial commitments, totaling hundreds of thousands of dollars, have already been allocated to this initiative. Specifically, NOACA's Board of Directors granted a $550,029 contract to Transportation Economics & Management Systems, Inc. (TEMS) for the Great Lakes Hyperloop Feasibility Study. This contract's objective is to assess the viability of an ultra-high-speed hyperloop system for both passenger and freight transport, initially connecting Cleveland and Chicago.

India

In 2016, Hyperloop Transportation Technologies engaged in discussions with the Indian Government regarding a proposed route between Chennai and Bengaluru, which conceptually projected a travel time of 30 minutes for the 345 km (214 mi) distance. Additionally, in 2018, HTT formalized an agreement with the Andhra Pradesh government to develop India's inaugural hyperloop project, designed to link Amaravathi and Vijayawada with an estimated 6-minute travel duration.

On February 22, 2018, Hyperloop One formalized a memorandum of understanding with the Government of Maharashtra. This agreement outlines the construction of a hyperloop transportation system between Mumbai and Pune, projected to reduce the current travel time from 180 minutes to merely 20 minutes.

In 2016, DGW Hyperloop, an initiative by Indore-based Dinclix Ground Works, proposed a hyperloop corridor connecting Mumbai and Delhi, with intermediate stops in Indore, Kota, and Jaipur.

Saudi Arabia

On February 6, 2020, the Ministry of Transport in the Kingdom of Saudi Arabia announced a contractual agreement with Virgin Hyperloop One (VHO) to conduct a pioneering pre-feasibility study on the application of hyperloop technology for passenger and cargo transport. This study is intended to establish a foundational framework for future hyperloop projects, building upon the developer's established relationship with the kingdom, which culminated with Crown Prince Mohammed bin Salman's viewing of VHO's passenger pod during a

Italy

In December 2021, the Veneto Regional Council ratified a memorandum of understanding with MIMS and CAV to facilitate the testing of hyper transfer technology.

Canada

In 2016, the Canadian hyperloop firm TransPod investigated potential hyperloop routes linking Toronto and Montreal, Toronto to Windsor, and Calgary to Edmonton. Toronto and Montreal, Canada's largest cities, are connected by Ontario Highway 401, the most heavily trafficked highway in North America. In March 2019, Transport Canada commissioned a comprehensive study on hyperloop systems to gain a more thorough understanding of their technical, operational, economic, safety, and regulatory dimensions, alongside their construction prerequisites and commercial viability.

The province of Alberta executed a Memorandum of Understanding (MOU) in support of TransPod's Calgary to Edmonton hyperloop project. TransPod intends to proceed, having secured US$550 million in private capital funding for the first phase, designated for establishing an airport connection for Edmonton. Nevertheless, the initiation of the project is contingent upon the company's prior development and testing of prototypes on designated test tracks.

Elsewhere in the World

In 2016, Hyperloop One unveiled the inaugural detailed business case globally for a 300-mile (500 km) route between Helsinki and Stockholm, envisioning a sub-Baltic Sea tunnel to link the two capitals in less than 30 minutes. Hyperloop One conducted a subsequent feasibility study in 2016, this time with DP World, focused on container transport from its Port of Jebel Ali in Dubai. In late 2016, Hyperloop One disclosed a feasibility study, in collaboration with Dubai's Roads and Transport Authority, for passenger and freight corridors linking Dubai with the broader United Arab Emirates region. During 2016, Hyperloop One also explored potential passenger routes within Moscow and a cargo hyperloop system designed to connect Hunchun in northeastern China with the Port of Zarubino, situated near Vladivostok and the North Korean border in Russia's Far East. In May 2016, Hyperloop One initiated its Global Challenge, soliciting comprehensive proposals for hyperloop networks worldwide. By September 2017, Hyperloop One identified 10 routes from a pool of 35 prominent proposals: Toronto–Montreal, Cheyenne–Denver–Pueblo, Miami–Orlando, Dallas–Laredo–Houston, Chicago–Columbus–Pittsburgh, Mexico City–Guadalajara, Edinburgh–London, Glasgow–Liverpool, Bengaluru–Chennai, and Mumbai–Chennai.

Additional European routes were proposed, notably a conceptual route in 2019 extending from Amsterdam or Schiphol Airport to Frankfurt. In 2016, a Warsaw University of Technology team commenced an evaluation of potential routes spanning from Kraków to Gdańsk across Poland, as suggested by Hyper Poland.

Hyperloop Transportation Technologies (HTT) entered into an agreement with the Slovakian government in March 2016 to conduct impact studies concerning potential connections between Bratislava, Vienna, and Budapest; however, no subsequent progress has been reported. In January 2017, HTT executed an agreement to investigate the Bratislava—Brno—Prague corridor within Central Europe.

In 2017, SINTEF, Scandinavia's largest independent research organization, expressed consideration for establishing a hyperloop test laboratory in Norway.

Mars

Musk posits that hyperloop technology represents the optimal mode for long-distance Martian transportation, given that Mars' atmospheric density is approximately 1% of Earth's at sea level, thereby obviating the need for enclosed tubes. On Earth, the hyperloop concept necessitates low-pressure tubes to mitigate aerodynamic drag. Conversely, a Martian implementation would leverage the significantly reduced atmospheric resistance, enabling a tube-less hyperloop system comprising solely a track, effectively functioning as a magnetically levitating train.

Open-Source Design Evolution

In September 2013, Ansys Corporation conducted computational fluid dynamics simulations to model the aerodynamic properties and shear stress forces impacting the alpha concept capsule. The simulation results indicated that the capsule's design required substantial modification to prevent supersonic airflow and necessitated an increased gap between the tube wall and the capsule. Ansys employee Sandeep Sovani acknowledged the challenges revealed by the simulation but expressed confidence in the hyperloop's feasibility.

In October 2013, the OpenMDAO software framework's development team published an incomplete, conceptual open-source model detailing components of the hyperloop's propulsion system. While the team posited that this model affirmed the concept's feasibility, it suggested a tube diameter of 13 feet (4 m), considerably exceeding initial projections. Nevertheless, this model was not a fully functional representation of the propulsion system, as it omitted numerous technical considerations essential for the physical construction of a hyperloop based on Musk's design, notably lacking substantial estimations for component weight.

In November 2013, MathWorks conducted an analysis of the alpha proposal's proposed route, concluding that it was largely feasible. This analysis primarily examined passenger acceleration and the requisite deviations from existing public roads to maintain acceptable acceleration levels. It specifically noted that sustaining the planned speeds along I-580 east of San Francisco would necessitate substantial diversions into densely populated regions.

A January 2015 paper, drawing upon the NASA OpenMDAO open-source model, reaffirmed the necessity for a larger tube diameter and a reduced cruise speed, approximating Mach 0.85. The study advocated for the elimination of on-board heat exchangers, based on thermal models illustrating interactions among the compressor cycle, the tube, and the ambient environment. It determined that the compression cycle would account for only 5% of the heat introduced into the tube, with the remaining 95% attributed to radiation and convection. Consequently, the weight and volume penalties associated with on-board heat exchangers were deemed disproportionate to their marginal benefit, especially since the tube's steady-state temperature would only rise 30–40 °F (17–22 °C) above ambient conditions.

According to Musk, certain technological facets of the hyperloop concept possess broader applications pertinent to his other ventures, such as surface transportation systems on Mars and electric jet propulsion.

In June 2017, researchers affiliated with MIT's Department of Aeronautics and Astronautics published findings that corroborated the aerodynamic design challenges near the Kantrowitz limit, a phenomenon initially theorized in the 2013 SpaceX Alpha-design concept.

In 2017, Dr. Richard Geddes and colleagues established the Hyperloop Advanced Research Partnership, intended to serve as a central repository for public domain reports and data related to hyperloop technology.

In February 2020, Hardt Hyperloop, Nevomo (formerly Hyper Poland), TransPod, and Zeleros collaboratively formed a consortium to advance standardization initiatives. This effort was integrated into a joint technical committee (JTC20), established by European standards organizations CEN and CENELEC, with the objective of formulating common standards to guarantee the safety and interoperability of hyperloop infrastructure, rolling stock, signaling, and associated systems.

Hyperloop Association

In December 2022, several hyperloop companies, including Hardt, Hyperloop One, Hyperloop Transport Technologies, Nevomo, Swisspod, TransPod, and Zeleros, established the Hyperloop Association. The Association's declared objectives encompass fostering the development and expansion of this nascent transportation market, as well as engaging with and supporting institutions in their collaborations with governmental and regulatory bodies concerning transportation policymaking. Ben Paczek, CEO and co-founder of Nevomo, serves as the representative for the Hyperloop Association.

Hyperloop Research Programs

EuroTube

EuroTube operates as a non-profit research organization dedicated to advancing vacuum transport technology. Currently, EuroTube is constructing a 3.1 km (1.9 mi) test tube facility in Collombey-Muraz, Switzerland. The organization originated in 2017 at ETH Zurich as a Swiss association and transitioned into a Swiss foundation in 2019. The planned test tube is designed at a 2:1 scale, featuring a 2.2 m diameter, and is engineered to accommodate speeds of 900 km/h (560 mph).

Hyperloop Development Program (HDP)

The Hyperloop Development Program functions as a public-private partnership, uniting public sector entities, industry participants, and research institutions. Its objectives include demonstrating hyperloop feasibility, conducting tests and demonstrations at the European Hyperloop Center Groningen, and identifying future prospects and opportunities for relevant industries and stakeholders. The European Hyperloop Center is currently under construction and will feature a 420-meter test facility, which includes a lane switch, with testing anticipated to commence in 2024. The program's total budget amounts to €30 million, receiving co-funding of €4.5 million from the Dutch Ministry of Infrastructure and Water Management and the Ministry of Economic Affairs and Climate Policy, alongside €3 million from the Dutch Province of Groningen. Key partners involved in the program comprise AndAnotherday, ADSE, Royal BAM Group, Berenschot, Busch, Delft Hyperloop, Denys, Dutch Boosting Group, EuroTube, Hardt Hyperloop, the Institute of Hyperloop Technology, Royal IHC, INTIS, Mercon, Nevomo, Nederlandse Spoorwegen, POSCO International, Schiphol Group, Schweizer Design Consulting, Tata Steel, TÜV Rheinland, UNStudio, and Vattenfall.

Swisspod

In July 2021, Swisspod introduced a 1:12 scale circular testing facility designed to simulate an "infinite" hyperloop trajectory, located on the EPFL campus in Lausanne, Switzerland. Between 2023 and 2024, Swisspod collaborated with École Polytechnique Fédérale de Lausanne to conduct a series of tests using their initial capsule prototype, which completed an 11.8 km (7.3 miles) journey and attained maximum speeds of 40.7 km/h (25.3 mph). These outcomes extrapolate to a full-scale hyperloop journey of 141.6 km (88.0 miles) at speeds reaching 488.2 km/h (303.4 mph). This achievement established a world record for the longest hyperloop mission conducted within a controlled low-pressure environment.

Swisspod is developing a second testing infrastructure located in Pueblo, Colorado, United States. By 2025, this facility is projected to be the world's largest of its type, featuring a test track spanning 520 meters (1,700 feet). Upon completion, the closed-loop system is anticipated to extend for one mile and encompass 43 acres. In November 2025, the company conducted tests of its inaugural hyperloop vehicle, AERYS 1, at the Pueblo infrastructure, reaching speeds of up to 102 km/h (65 mph).

TUM Hyperloop (previously WARR Hyperloop)

TUM Hyperloop constitutes a research program established in 2019, originating from the hyperloop pod competition team at the Technical University of Munich. The TUM Hyperloop team previously secured victories in three consecutive competitions, establishing a world record speed of 463 km/h (288 mph), which remains current. The program aims to investigate the technical feasibility through a demonstrator, concurrently simulating the economic and technical viability of the hyperloop system. The proposed 24-meter demonstrator will comprise a tube and a full-scale pod. Subsequent to the completion of the initial project phase, plans include extending the track to 400 meters to facilitate research into higher speeds. These extensions are projected for locations within the Munich area, specifically Taufkirchen, Ottobrunn, or the Oberpfaffenhofen airfield. Operational certification commenced in Ottobrunn in July 2023.

Hyperloop pod competition

During the 2015–2016 period, numerous student and non-student teams engaged in a hyperloop pod competition. Subsequently, a minimum of 22 teams developed hardware for competition on a sponsored hyperloop test track in mid-2016.

In June 2015, SpaceX declared its intention to sponsor a hyperloop pod design competition and construct a 1-mile-long (1.6 km) subscale test track adjacent to its headquarters in Hawthorne, California, for the 2016 competitive event. In its official announcement, SpaceX clarified: "Neither SpaceX nor Elon Musk maintains affiliations with any Hyperloop companies. Although we are not independently developing a commercial Hyperloop, we are committed to facilitating the accelerated development of a functional Hyperloop prototype."

By July, over 700 teams had submitted preliminary applications. A preliminary design briefing took place in November 2015, from which over 120 student engineering teams were chosen to submit Final Design Packages, with a deadline of January 13, 2016.

A Design Weekend for invited entrants was convened at Texas A&M University from January 29 to 30, 2016. Engineers representing the Massachusetts Institute of Technology secured the competition's top honor. The University of Washington team received the Safety Subsystem Award, while Delft University earned both the Pod Innovation Award and second place overall. Subsequent placings included the University of Wisconsin–Madison, Virginia Tech, and the University of California, Irvine. In the Design Category, the Hyperloop UPV team from Universidad Politécnica de Valencia, Spain, was victorious. On January 29, 2017, Delft Hyperloop (Delft University of Technology) was awarded the "best overall design" prize during the final phase of the SpaceX hyperloop competition. Concurrently, WARR Hyperloop from the Technical University of Munich received the "fastest pod" award, with the Massachusetts Institute of Technology securing third place.

The second hyperloop pod competition occurred between August 25 and 27, 2017, with the sole evaluation criterion being maximum speed, contingent upon successful deceleration. WARR Hyperloop, representing the Technical University of Munich, triumphed in the competition by achieving a peak speed of 324 km/h (201 mph).

A third hyperloop pod competition was conducted in July 2018. The reigning champions, the WARR Hyperloop team from the Technical University of Munich, surpassed their previous record, attaining a maximum speed of 457 km/h (284 mph) during their attempt. The Delft Hyperloop team, representing Delft University of Technology, secured second place, and the EPFLoop team from École Polytechnique Fédérale de Lausanne (EPFL) achieved a third-place finish.

The fourth competition, held in August 2019, witnessed the team from the Technical University of Munich, now operating as TUM Hyperloop (by NEXT Prototypes e.V.), once again claim victory and establish a new record with a peak speed of 463 km/h (288 mph).

Critiques

Passenger Experience

Critics of the Hyperloop concept frequently highlight the potentially adverse and unsettling passenger experience, characterized by travel within a confined, sealed, windowless capsule inside a steel tunnel. This environment would subject occupants to substantial acceleration forces, elevated noise levels from air compression and ducting at near-sonic velocities around the capsule, and considerable vibration and jostling. Even if the tube's initial construction is smooth, seismic activity could induce ground shifts. At elevated velocities, even slight deviations from a linear trajectory could generate significant buffeting. These concerns are compounded by practical and logistical challenges associated with managing safety issues, including equipment malfunctions, accidents, and emergency evacuations.

Design and Safety Considerations

YouTube content creator Adam Kovacs has characterized Hyperloop as a "gadgetbahn," asserting it represents an expensive, unproven system that offers no discernible advantages over established technologies like conventional high-speed rail. John Hansman, a professor of aeronautics and astronautics at MIT, has identified potential design flaws, including the mechanisms for compensating for minor tube misalignments and the prospective interaction between the air cushion and the low-pressure atmospheric conditions. Furthermore, he has raised inquiries regarding the implications of a power failure when a pod is situated remotely from an urban center. Richard Muller, a physics professor at UC Berkeley, has similarly voiced apprehension concerning the Hyperloop's "novelty and the vulnerability of its tubes, [which] would be a tempting target for terrorists," and the potential for the system to be compromised by routine dirt and grime.

The viability of powering the Hyperloop system with solar panels positioned along its entire length, as proposed, has been challenged by Roger Goodall, a maglev train expert and engineering professor at Loughborough University. Goodall posited that the air pumps and propulsion mechanisms would likely necessitate significantly greater power than the solar panels could produce.

Economic Considerations

The initial proposal anticipated cost reductions compared to conventional rail, attributing them to several factors. The system's compact, elevated design was envisioned to facilitate its construction predominantly within the median of Interstate 5; however, the practical feasibility of this approach remains contentious. Furthermore, the reduced profile was expected to minimize tunnel boring requirements, and the lightweight capsules were projected to lower overall construction expenses relative to traditional passenger rail. Proponents also asserted that its compact, sealed, and elevated design would mitigate right-of-way disputes and environmental impacts, unlike a conventional rail easement; nevertheless, other critics argue that a reduced footprint does not inherently guarantee less public resistance. Contrarily, mass transportation writer Alon Levy criticized this premise, stating that an entirely elevated system, as proposed for Hyperloop, constitutes a design flaw rather than an advantage, given that land in the Central Valley is inexpensive while pylons are costly, a fact evident from elevated infrastructure expenses globally. Michael Anderson, a professor of agricultural and resource economics at the University of California, Berkeley, estimated the total costs could reach approximately US$100 billion.

The projected low ticket prices advanced by Hyperloop developers have faced scrutiny, with Dan Sperling, director of the Institute of Transportation Studies at the University of California, Davis, asserting that such economic models are unsustainable. Critics further contend that the Hyperloop's lower passenger capacity, relative to conventional public train systems, would complicate the establishment of ticket prices sufficient to offset construction and operational expenditures. A study conducted by TU Delft researchers indicated that fares would need to exceed €0.30 per passenger-kilometer, significantly higher than the €0.174/p-km for high-speed rail and €0.183/p-km for air travel.

The initial cost projections for the Hyperloop system have been a significant point of contention. Numerous economists and transportation specialists have argued that the initial US$6 billion estimate substantially underestimates the expenses associated with the design, development, construction, and testing of an entirely novel transportation modality. The Economist magazine commented that these estimates are improbable to evade the typical cost escalations observed in other major infrastructure endeavors. Hyperloop One, for instance, projected costs for a Bay Area loop to range from $9 billion to $13 billion in total, equating to $84 million to $121 million per mile. For a project in the United Arab Emirates, the company estimated $52 million per mile, while a Stockholm-Helsinki route was reported at $64 million per mile. A 2022 survey by the International Maglev Board, involving global transportation experts, suggested that the Hyperloop significantly underestimates the complexities of operation and safety, as well as both infrastructure and operational costs.

Political Considerations

Significant political impediments to Hyperloop construction in California may arise from the substantial "political and reputation capital" already invested in the state's existing high-speed rail mega-project. Given California's political economy, substituting the current high-speed rail design with an alternative would be complex; consequently, Texas has been proposed as a more favorable location due to its accommodating political and economic landscape.

The successful development of a sub-scale Hyperloop demonstration project could potentially mitigate political obstacles and refine cost projections. In 2013, Musk indicated a potential personal involvement in constructing a prototype demonstration of the Hyperloop concept, including financial backing for its development.

The New York Times identified the primary obstacle to Hyperloop implementation as the necessity of establishing a complete infrastructure, which entails constructing extensive networks of tubes and stations, securing rights-of-way, complying with governmental regulations and standards, and preventing ecological disruption along the proposed routes.

Hyperloop Companies

Related Concepts

Historical Related Concepts

• In 1799, British mechanical engineer and inventor George Medhurst conceptualized the pneumatic tube, proposing the use of high-pressure air behind a capsule for propulsion. He further articulated this concept in a 1812 book, detailing his vision for transporting passengers and goods through airtight tubes via air propulsion.
• John Vallance secured a patent for a pneumatic tube railway in 1824, subsequently constructing a model at his Brighton premises in 1826. However, the proposed system was deemed economically unviable due to its high costs and the anticipated reluctance of passengers to travel within an enclosed tube.
• The Beach Pneumatic Transit, based on a concept by Alfred Ely Beach, operated from 1870 to 1873 as a one-block prototype for an underground public transit system in New York City. This system functioned at near-atmospheric pressure, propelling the passenger car by applying higher pressure air to its rear while maintaining comparatively lower pressure air in front.
• Vactrains were investigated during the 1910s, with concepts articulated by American rocket pioneer Robert Goddard and other researchers. Unlike pneumatic tube systems, vactrains do not rely on pressure for propulsion; instead, they harness a near-perfect vacuum to mitigate aerodynamic drag ahead of the vehicle. Propulsion and suspension are achieved through magnetic levitation.
• Swissmetro represented a proposed system for operating a maglev train within a low-pressure environment. In the early 2000s, regulatory approvals were granted to Swissmetro for connecting the Swiss cities of St. Gallen, Zurich, Basel, and Geneva. However, commercial feasibility studies yielded divergent conclusions, and the vactrain project never materialized.
• The ET3 Global Alliance (ET3), established by Daryl Oster in 1997, envisioned a global transportation system utilizing passenger capsules within frictionless magnetic levitation, full-vacuum tubes. Elon Musk reportedly expressed interest in potentially investing in a 3-mile (5 km) prototype of ET3's proposed design.
• In 2003, Franco Cotana initiated the development of Pipenet, a system conceptualized for freight transport at speeds up to 2,000 km/h (1,200 mph) within an evacuated tube, employing linear synchronous motors and magnetic levitation. A 100 m-long (110 yd) and 1.25 m-diameter (1.37 yd) prototype was constructed in Italy in 2005; however, development ceased due to a lack of funding.
• In August 2010, a vacuum-based maglev train system, capable of 600 mph (1,000 km/h), was proposed for China. This project was estimated to incur additional costs of CN¥10–20 million (US$2.95 million at the August 2010 exchange rate) per kilometer compared to conventional high-speed rail. By 2018, a 45 m (49 yd) loop test track was completed to evaluate specific technological components.

Vactrains Operating Under the 'Hyperloop' Moniker

• An academic journal in 2018 articulated a concept for intermodal Hyperloop capsules. These capsules, once detached from their propulsion mechanisms, could potentially function as conventional containers for the rapid transport of goods or individuals. The proposal further suggested that specialized aircraft, high-speed trains, road vehicles, or watercraft could provide "last-mile" transport, addressing the challenge of rapid delivery to locations where Hyperloop terminals are either unavailable or impractical to construct.
• In May 2021, reports indicated that construction had commenced on a low-vacuum sealed tube test system in Datong, Shanxi Province, designed to achieve speeds of approximately 1,000 km/h (620 mph). An initial 2 km (1.2 mi) segment was completed in 2022, with the full 15 km (9.3 mi) test line projected for completion within two years. This line is being developed by the North University of China and the Third Research Institute of China Aerospace Science and Industry Corporation.
• An experimental European operational Hyperloop testing facility was initiated in July 2021. This test tube, fabricated from an aluminum alloy, features a loop diameter of 40 m (130 ft) and a length of 120 m (390 ft). Its construction was a collaborative effort between the Swiss-American startup Swisspod and the Distributed Electrical Systems Laboratory (DESL) of École Polytechnique Fédérale de Lausanne.
• In September 2021, Swisspod Technologies and MxV Rail (formerly TTCI), a subsidiary of the Association of American Railroads (AAR), initiated a collaborative effort aimed at establishing a full-scale testing facility for Hyperloop technology on the Pueblo Plex campus in Pueblo, Colorado, US. The principal objective of this facility would be to conduct research and development activities focused on Swisspod's proprietary Hyperloop propulsion system.

References

References

"Europe's Inaugural Hyperloop Test Track Established at TU Delft". newatlas.com. 2 June 2017. Retrieved 6 June 2017.

• "Europe's first Hyperloop test track pops up at TU Delft". newatlas.com. 2 June 2017. Retrieved 6 June 2017.Source: TORIma Academy Archive