Intersection Treatments


Intersection treatments for bicycle facilities should reduce conflict between bicyclists, vehicles, and other vulnerable road users by maintaining visibility and clearly indicating the right-of-way. Treatments include:

  • Bike boxes
  • Crossing markings
  • Two-stage turn queue boxes
  • Median refuge islands
  • Through bike lanes
  • Combined bike lane/turn lane

These treatments may include the use of color, signage, medians, signal detection, bicycle signals, and pavement markings. The NACTO Urban Bikeway Design Guide presents detailed descriptions and illustrations of each of these treatments.


Provide safe and convenient ways for bicyclists to navigate intersections.


  • The existing and anticipated bicyclist, pedestrian, and motorist movements.
  • Clearly indicate to bicyclists and motorists how they should traverse the intersection.
  • A complex intersection might be a candidate for conversion to a roundabout.
  • Bike lanes approaching an intersection should continue through the intersection to a receiving bike lane on the far side. At complex intersections, dashed lines and/or colored pavement may be helpful for this purpose.
  • Bike lanes should be placed on the left side of a vehicle right-turn-only lane.


Costs vary depending on the type of treatments needed and the scale of the project, but an estimate of costs can be determined for the project using this resource.