Intersections

A bike lane at this intersection is marked to the left of right turning vehicles.

The design of bike lanes at intersections is complicated by the need to accommodate numerous turning movements by both motor vehicles and bicyclists, often with limited available space. The recommended designs are based on the assumption that:

  • motorists making right turns should make their turn from as close to the right-hand curb as practicable
  • bicyclists going straight ahead shall be to the left of right turning traffic
  • bicyclists turning left should turn from a left turn lane or as close to the centerline or the left side lane as practicable.

Bike lane at uncontrolled intersection: bike lane stripes should not be extended through a pedestrian crosswalk or any street intersection (with the exception of dashed lines which is optional through some intersections).

Bike lane at controlled intersection: bike lane stripe should ends at stop line or crosswalk with right turning traffic bike lane. Bike lanes should not be striped through controlled intersections, except with dashed lines through some complex intersections (optional).

Bike lane at intersection with right turn lane: see diagram (on p. 29 of the AASHTO Guide for the Development of Bicycle Facilities, 3rd Edition). Bicyclists going straight ahead shall be to the left of right turning traffic, and bicycle lanes should not be marked on streets with multiple right turn lanes.

Bike lane at intersection with left turn lane: When bike lanes are marked for left turn movements the bike lane stripe should be to the right of left turning vehicles. (See MUTCD Figure 9C-1)

Bike lane at modern roundabout: According to the AASHTO Guide for the Development of Bicycle Facilities, discontinue lane line 35-65 feet (10m-20m) prior to a traffic circle or roundabout, and bike lanes markings are not to be marked on the circular roadway.

Bike lane at high speed interchange: see diagram (on p. 63 of the AASHTO Guide for the Development of Bicycle Facilities, 3rd Edition).

The Bicycle Subcommittee to the National Committee on Uniform Traffic Control Devices is currently looking into providing improved guidance on the design of bike lanes at intersections in the MUTCD.