COLLECTION AND DISTRIBUTION SYSTEMS - TECHNICAL REVIEWS OF SIX BASELINE DEFINITIONS

THIS REPORT CONTAINS INDIVIDUAL TECHNICAL EVALUATIONS OF SIX PROPOSED COLLECTION AND DISTRIBUTION SYSTEMS: (1) VARO MONOCAB, (2) WESTINGHOUSE VEHICLE SYSTEM, (3) TRANSPORTATION TECHNOLOGY SYSTEM, (4) SKY-KAR TRANSIVATOR, (5) ALDEN STARRCAR, AND (6) DASHAVEYOR TRANSIT SYSTEM. THE VARO MONOCAB IS DESIGNED PRIMARILY TO SERVE AS A TRANSPORTATION SYSTEM FOR A MAJOR ACTIVITY CENTER. IT CONSISTS OF SMALL, CLOSELY SPACED, ELECTRICALLY POWERED VEHICLES SUSPENDED FROM A GUIDEWAY NETWORK AND OPERATING A DEMAND-ACTIVATED MODE. THE MONORAIL GUIDEWAY IS SUPPORTED AT 60-FOOT INTERVALS BY STEEL COLUMS. ALONG THE HIGH-SPEED SECTIONS THE GUIDEWAY IS ATTACHED TO THE COLUMNS BY SECTIONS OF STEEL CABLE THAT PROVIDE THE GUIDEWAY WITH A "SPRING SUSPENSION". THE WESTINGHOUSE VEHICLE SYSTEM FOR MAJOR ACTIVITY CENTERS CONSISTS OF 20 FOOT-LONG, PNEUMATIC-TIRED, AUTOMATIC VEHICLES OPERATING SINGLY OR IN TRAINS OVER AN EXCLUSIVE RIGHT-OF-WAY. THIS SYSTEM HAS EVOLVED FROM THE TRANSIT EXPRESSWAY AND DIFFERS FROM IT PRIMARILY IN THE USE OF A SMALLER VEHICLE, IN THE RAISING OF THE GUIDEBEAM ABOVE THE SUPPORT SURFACE, AND IN THE METHOD OF AUTOMATIC CONTROL. THE TRANSPORTATION TECHNOLOGY DISTRIBUTION SYSTEM IS A SMALL- VEHICLE CONCEPT THAT EMPLOYS AIR CUSHION PADS FOR SUPPORT AND SUSPENSION, LINEAR INDUCTION MOTORS (LIM'S) FOR PROPULSION AND BRAKING, AND CENTRAL COMPUTER CONTROL OF VEHICLE SPEED, HEADWAY, SCHEDULING, AND ROUTING. SIX-AND TWELVE-PASSENGER VEHICLES ARE OPERATED IN A MULTIPLE-LOOP SYSTEM WITH A MAXIMUM SPEED OF 60 MPH AND A MINIMUM HEADWAY OF 10 SECONDS. THE SKY-KAR TRANSIVATOR IS DESIGNED TO SERVE PRIMARILY AS A COLLECTION AND DISTRIBUTION SYSTEM FOR MAJOR ACTIVITY CENTERS. THE SYSTEM CONSISTS OF SMALL VEHICLES SUSPENDED FROM OVERHEAD PNEUMATIC-TIRED TRUCKS THAT TRAVEL ALONG A STEEL I-BEAM GUIDEWAY SUPPORTED BY PYLONS HAVING A NOMINAL SPACING OF 50 FEET. IT IS RECOMMENDED THAT DURING PROTOTYPE TESTING OF THE WESTINGHOUSE VEHICLE SYSTEM SPECIAL CONSIDERATION BE GIVEN TO POTENTIAL COMMUNICATIONS INTERFERENCE RESULTING FROM ELECTRICAL NOISE GENERATED BY THE PROPULSION AND POWER COLLECTION EQUIPMENT. THE SHORT HEADWAY OPERATION PROPOSED FOR THE SKY-KAR TRANSIVATOR IMPOSES A SEVERE CONSTRAINT ON THE TIME AVAILABLE FOR SWITCHING; THEREFORE, ON-BOARD SWITCHING EQUIPMENT BE DEVELOPED. THE LIM EMPLOYED BY THE TRANSPORTATION TECHNOLOGY DISTRIBUTION SYSTEM, PROVIDES AN ATTRACTIVE ALTERNATIVE TO ROTARY MOTORS FOR LOW-SPEED, SMALL-VEHICLE TRANSPORTATION SYSTEMS. AT PRESENT, HOWEVER, LIM DESIGN HAS NOT BEEN OPTIMIZED FOR URBAN TRANSPORTATION APPLICATIONS. ALSO, LIM MOTOR THRUST CONTROLLERS HAVE YET TO BE DEMONSTRATED UNDER THE RATE OF OPERATIONAL REQUIREMENTS TYPICAL OF AN URBAN APPLICATION. FURTHER DEVELOPMENT EFFORT IN THESE AREAS IS RECOMMENDED. /UMTA/

  • Supplemental Notes:
    • PROJ NO TRD-43
  • Corporate Authors:

    Johns Hopkins University, Laurel

    Applied Physics Laboratory, 11100 Johns Hopkins Road
    Laurel, MD  United States  20723-6099
  • Authors:
    • HINMAN, E J
    • Brown, S J
    • Mark, F F
    • Pitts, G
    • Carlson, R S
  • Publication Date: 1970-6

Subject/Index Terms

Filing Info

  • Accession Number: 00242149
  • Record Type: Publication
  • Source Agency: Urban Mass Transportation Administration
  • Files: TRIS, USDOT
  • Created Date: Oct 23 1972 12:00AM