W2b roadway byrne

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W2b roadway byrne

  1. 1. 2Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 05.11.2010 & 05.12.2010 Bill Byrne, DEA Dan Sosnovoske, Tri-Met
  2. 2. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 3Overview • Right-of-way types • Alignment types • Types of protection • Traffic and pedestrian considerations • Grade separate? • Example functional layouts • Intersection and crossing design • Traffic control strategies and systems • Signing and signal indications • Resources
  3. 3. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 4Right-of-Way Types - TCRP 17 Exclusive
  4. 4. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 5Right-of-Way Types Semi-exclusive - separate ROW
  5. 5. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 6Right-of-Way Types Semi-exclusive shared ROW with curbs and/or fences
  6. 6. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 7Right-of-Way Types Semi-exclusive shared ROW with striping or mountable curbs
  7. 7. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 8Right-of-Way Types Non-exclusive mixed traffic Portland Streetcar
  8. 8. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 9Right-of-Way Types Non-exclusive transit or pedestrian/transit mall Sacramento LRT Buffalo NY LRT
  9. 9. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 10 Alignment Types Semi-exclusive - Median VTA San JoseBoston Green Line
  10. 10. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 11Alignment Types Semi-exclusive side of street -single track (with flow)
  11. 11. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 12Alignment Types Semi-exclusive side of street - single track (contra-flow)
  12. 12. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 13Alignment Types Semi-exclusive side of street single track (reversible)
  13. 13. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 14Alignment Types Semi-exclusive side of street single track (reversible)
  14. 14. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 15Alignment Types Semi-exclusive side of street double track
  15. 15. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 16Alignment Types Semi-exclusive side of street double track
  16. 16. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 17Traffic and Pedestrian Interfaces Depend on Right of Way Type • None for Exclusive (all RRT, some CR, some LRT) • Limited for Semi-exclusive (CR and LRT) • Extensive for non-exclusive (LRT)
  17. 17. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 18Types of Protection Crossings • Passive signs • Active signs • Traffic signals • Gates • Warning devices
  18. 18. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 19Traffic and Pedestrian Considerations • Pedestrian safety • Pedestrian access to system and adjacent properties • Traffic safety • Vehicular access to adjacent properties • Traffic capacity and flow • LRT travel time • LRT reliability • Passenger safety
  19. 19. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 20Key Issues • Turning vehicles • Crossing vehicles • Pedestrians • Start-up
  20. 20. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 21Should You Grade Separate? Factors • Roadway functional class and speed • Roadway traffic volumes • LRT headways • LRT operating speed • Type of traffic control • Operating environment • Urban design • Cost
  21. 21. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 22ITE Informational Report
  22. 22. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 23DART Guidelines (1992)
  23. 23. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 24Interfaces with Pedestrians • Sight distance • Channelization • Crossing gates • Bikes, wheel chairs, high heels • Pedestrian bridges • Development interfaces
  24. 24. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 25
  25. 25. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 26Channelization of Pedestrian Crossings
  26. 26. Light Rail Transit Facilities Design Course Roadway Interfaces & Traffic Engineering 27StandardDetail ofTypical PedZ-Crossing

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