Low-Level Cycle Signals: On-Street Observations of Early Release and Hold the Left

This report considers two British innovations in infrastructure for cyclists. At signalized intersections, Hold the Left (HTL) provides a bicycle lane or fully segregated track with its own traffic signals, separated from adjacent traffic lanes by an island. The traffic signal stage is set up so that the green signal for the ahead movement from the bicycle lane and the green signal for left-turning vehicle movements do not occur simultaneously. This reduces the risk of collisions between left-turning motor vehicles and bicycles. Where there is sufficient space, the bicycle movements can also be separated allowing non-conflicting bicycle movements to run in parallel with traffic movement. Early Release (ER) provides a separate set of traffic signals for cyclists along with an Advanced Cycle Stop-line (ASL) and lead-in bicycle lane. The bicycle signals display a green aspect a number of seconds in advance of the green aspect signal for vehicles. This allows cyclists to proceed into a junction in advance of other waiting vehicles, and for the cyclists to clear the left turn conflict point. Transport for London is introducing this infrastructure across the capital to improve safety and increase levels of bicycling among all types of people. This report presents the findings of research on HTL and ER that have been installed at various signalized intersections, based on video surveys of cyclists’ behavior, and questionnaires on how users perceive these facilities.

• Record URL:
  https://trl.co.uk/sites/default/files/PPR856%20-%20Low-Level%20Cycle%20Signals%20-%20On-Street%20Observations%20of%20Early%20Release%20and%20Hold%20the%20Left.pdf
• 
• Summary URL:
  https://trl.co.uk/publications/street-observations-early-release-and-hold-left
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9781912433322
• Corporate Authors:

  TRL Limited

  Crowthorne House, Nine Mile Ride
  Wokingham, Berkshire  United Kingdom  RG40 3GA

  Transport for London

  London,   United Kingdom 
• Authors:
  • Clifford, S
  • Millard, K
  • Greenshields, S
  • Wells, A
• Publication Date: 2018-7

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; Maps; References; Tables;
• Pagination: 59p

Subject/Index Terms

• TRT Terms: Behavior; Bicycle lanes; Bicycling; Cyclists; Left turns; Signalized intersections; Traffic conflicts; Traffic signals
• Geographic Terms: London (England)
• Subject Areas: Highways; Operations and Traffic Management; Pedestrians and Bicyclists;

Filing Info

• Accession Number: 01680661
• Record Type: Publication
• ISBN: 9781912433322
• Report/Paper Numbers: PPR856
• Files: TRIS
• Created Date: Sep 17 2018 5:19PM