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References & Calculations

References & Calculations
News Updates U-link
  1. Wikipedia, "Bus rapid transit," 10 sec bus headway.
  2. Transit Capacity and Quality of Service Manual 2nd Edition,  "Part 5 Rail Transit Capacity," p 5-51., 30 trains per hour maximum frequency for grade separated lane.
  3. Wikipedia, “Link Light Rail200 passenger car capacity with 74 seats support 4-car trains,

  4. Wikipedia, “Washington Metro rolling stock,” Washington Metro 6000 series car 174 capacity with 64 seats supports 8 car trains

  5. Sound Transit, "DRAFT 2016 Service Implementation Plan," October 12th 2015
    Sound Transit implements load standards which ensure acceptable passenger spacing for Americans
     p 117, Table 17 - Standing Time Corrective Action Priority for Rail Modes 
    Link load factor for over 30 minutes is 2.0  
    Table 14  Load Factor Standards by Bus Type (p. 16)
     Bus type or train Number of Seats Max. Passenger Load Load Factor
     U-Link Light Rail 4 cars4*74=296592
     DC metro 8 cars8*64=51210242
     45' High Floor 57 701.23 
     60' Low Floor 56 811.45 
     42' Double Decker 77 95 1.23
    .
  6. 1-way capacity equals number of sitting and standing riders times 360 buses, 30 DC Metro trains and 10 U-link trains/hr
     Bus type Number of Seats Max. Passenger Load standees seated total standee
    total
     Load Factor
    U-Link Light Rail 4 cars
    296592 296 2,9602,9602.0
    DC metro 8 cars 5121024  512 15,36015,3602.0
     45' High Floor 57 70 13 20,520 4,6801.23 
     60' Low Floor 56 81 25 20,160 9,0001.45 
     42' Double Decker 77 95 18 27,720 6,480 1.23
  7. U-link standing capacity = 2,960/27,720 =   11% of separated bus lane carrying double decker buses
  8. U-link total capacity = (2*2,960)/(27,720+6480) =   17% of separated bus lane carrying double decker buses
  9. "Would voters dig another transit tunnel?," Seattle Times, December 4, 2015 at 10:02 am
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