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Transportation research at the University of Minnesota covers the spectrum from fundamental to applied research, drawing on the many transportation-related disciplines within the University. The Center actively supports the formation of multidisciplinary research teams.

Research spotlight

Research analyzes conversion options for four-lane undivided highways

CTS Research E-News, April 2008

Keith Knapp

Four-lane undivided highways passing through small towns often have poor safety records, characterized by collisions between left-turning vehicles and oncoming traffic in the opposite lanes. Converting to three lanes with a central two-way turn lane is one solution frequently considered by transportation agencies. But while conversion to three lanes can provide advantages to local stakeholders, Keith Knapp cautioned that careful planning is necessary to carry out a successful conversion.

Knapp, research manager for the Center for Excellence in Rural Safety, gave an overview of considerations affecting three-lane conversions in a CTS Research Seminar March 20. A video recording of the seminar is available on the CTS Web site, as well as Knapp’s presentation slides. More

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