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Initial Applications for Automated Vehicles on Exclusive Roadways Advanced Transit Association Annual Technical Meeting January 11, 2009 Washington, DC Robert Johnson R. E. Johnson Consulting Rockville, Maryland www.REJConsult.com
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www.REJConsult.com2 Examples of Small Automated Road Vehicles CyberCab: proposed by 2getthere which developed the first public automated road vehicle (ParkShuttle) ULTra: scheduled to begin service in 2009 at Heathrow airport, London
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www.REJConsult.com3 Alternative Interior Layouts and Service Concepts Typical PRT –Two fixed seats –Two fold-down seats –Could have pure PRT or some sharing “Automated Microbus” –Four fixed seats –Two fold-down seats –More suitable for shared operation
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www.REJConsult.com4 Benefits of Exclusive Roadway Narrow -- 6 ft (1.8 m) or less wide Only need 6.5 ft (2.0 m ) vertical clearance Light duty construction Much safer without human drivers in other vehicles Much simpler control system
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www.REJConsult.com5 Exclusive Roadway Elevated, At Grade, Under Existing Bridge
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www.REJConsult.com6 ULTra System at Heathrow Airport
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www.REJConsult.com7 Stations and Interchanges Similar to to ULTra system connecting Heathrow Terminal 5 to parking lot, because... Decision makers are very conservative Heathrow design suitable for a number of applications
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www.REJConsult.com8 In Example Applications, Stations are on Loop at End of Two-Way Line
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www.REJConsult.com9 Application Characteristics Small system -- 1 to 4 lane miles (2 to 6 lane km ) of “guideway” Extends some other mode –Rail Transit: system provides rail station access –Airport: provides landside circulation Auto congestion an issue, but... Low enough density in immediate area that space available for guideway Limited snow/ice, so can melt with guideway heating
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www.REJConsult.com10 Applications in Suburban Washington, DC Montgomery College Connector -- College is next to heavy rail line, but between stations DANAC Station Connector -- Provides access to station on planned BRT or light rail system College Park Engineering Connector -- Serves existing heavy rail and planned BRT or light rail
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www.REJConsult.com20 Space Under Route 1 Bridge May be Usable for Automated Vehicle Lanes
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www.REJConsult.com21 Next Steps in Analyzing an Application Is guideway layout really feasible? Compute infrastructure cost Determine station-to-station (free flow) travel time and average wait time Find ridership by running existing 4-step model for area with automated system in place Determine fleet size, VMT, system costs, and benefit/cost ratio
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www.REJConsult.com22 For more information about the applications shown here and others, please see: www.AutoRoadVehicles.com
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