For more than 50 years, the Local Road Research Board (LRRB) has brought important developments to transportation engineers throughout Minnesota. Those developments range from new ways to determine pavement strength to innovative methods for engaging the public. Today, the LRRB remains true to its important mission: supporting and sharing the latest transportation research applications with the state’s city and county engineers.

Hot Topics

Why is All the Colored Concrete Deteriorating So Fast?

Across Minnesota, many of the estimated 45 colored concrete projects have experienced early deterioration, particularly microcracking near contraction joints. Early cracking has prompted the city of Vadnais Heights to tear up its colored concrete, and the city of Centerville —which installed colored concrete only six years ago— plans to follow suit. Both cities participated in a recent study, sponsored by the Local Road Research Board and conducted by MnDOT, to determine what is causing the early deterioration.
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November 24, 2014

What’s With All the Potholes?

Why do roads go bad, and why aren't they fixed immediately? This LRRB video, featuring Don Shelby and local transportation officials, explains the reasons roads deteriorate and why the worst roads aren’t necessarily fixed first. See the video in the inset screen below, or click here to watch the video on You Tube.

  • May 23, 2014

    New Work Zone Safety Videos

    The Local Road Research Board recently produced a pair of new work zone safety videos. Click on the links below, or browse these and other videos on the LRRB Resources page.

    October 15, 2013