Mn/DOT studies bypass lane safety
Mn/DOT recently released a report titled Bypass Lane Safety, Operations and Design Study. Because there has been a debate over the operational and safety effects of these lanes, Mn/DOT hired BRW, Inc. to help conduct a study that allowed Mn/DOT to compile definitive data about bypass lanes.
The purpose of the study was to offer statistically reliable conclusions based on a comparison of the safety and operational qualities of rural intersections without turning lanes, with left turn lanes, and with bypass lanes.
To compile the report, previously published research reports, surveys of bypass lane usage by local units of government, and operations and safety analyses of the different types of intersections were used. The research team also provided a summary of legal issues from the Attorney General's staff, conducted a review of Mn/DOT's recommended design specifications and features, and suggested changes that would be likely to increase consistency in both the design and application of bypass lanes. The research utilized a technical advisory panel made up of senior Mn/DOT staff representing the offices of Traffic Engineering, Research, Geometric Design Standards, several districts, and the Metropolitan Division.
The report concluded that bypass lanes should not be used as a safety device and offered recommendations for the better utilization of bypass lanes. To request a copy of this report (#2000-22), call the Office of Research Services at 651-282-2274 or 800-657-3774.
—Emily Endries