Effect of Signing and Lane Marking for Two Lane Roundabouts

Purpose:

This study evaluates the effect of lane markings and signage changes on driver behavior at a two-lane roundabout in Richfield, Minnesota, following a high crash rate after its 2008 completion. Engineers made adjustments to reduce improper turns and lane selection errors, resulting in a 48% reduction in improper turns and a 53% reduction in incorrect lane choices within a month, with sustained improvements after a year.

Diagrams of two types of two-lane roundabout signing. Includes yield signs, pedestrian signs, roundabout indicators, and signs indicating turn lanes

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Camera Information:

Camera Name: 360 Cam (Portland/66th St Roundabout)

Resolution: 1920x1440

Framerate: 15

Location: 44.883549, -93.267847

Camera Name: Portland Ave N/66th St Roundabout (Facing North) (MISTAKE; LOCATION EXISTS ALSO IN NESTED FOLDER)

Resolution: 720x480

Framerate: 7

Location: 44.883549, -93.267847

Camera Name: Portland Ave N/66th St Roundabout (Facing East) (MISTAKE; LOCATION EXISTS ALSO IN NESTED FOLDER)

Resolution: 720x480

Framerate: 7

Location: 44.883549, -93.267847