Urban Gravity - Vacuum Transit System

by Lawrence K. Edwards,

Serial Information: Transportation Engineering Journal of ASCE, 1969, Vol. 95, Issue 1, Pg. 173-202

Document Type: Journal Paper


Gravity-Vacuum Transit (GVT), a passenger transportation system which employs gravity and vacuum for propulsion, is described for urban applications. The physical principles are presented which permit GVT trains to operate at roughly twice the average speed of conventional rapid transit while satisfying the same passenger-comfort criteria. A system-engineered train configuration is described which affords unusually generous passenger space while permitting an economical tunnel-section, slightly over half that of present transit tunnels. A possible system from San Francisco to Marin County is presented and its performance discussed. The GVT tunnel-section is shown and several advantages of deep tunnels are cited. Details of the tubes and tube suspension within the tunnels are also discussed. The wheel-rail interface is presented and the train and station configurations are described. Further information is presented concerning valves, pumps, turnaround and shop facilities, and profile characteristics. A performance summary is given in tabular form.

Subject Headings: Tunnels | Passengers | Urban areas | Transportation management | Railroad stations | Permits | Rapid transit systems | Professional societies

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