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.

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Guidance for Temporary Traffic Control

Having trouble determining how to select the appropriate work zone? The Minnesota Local Road Research Board (LRRB) recently funded the development of two supplemental guidebooks to help local agencies identify the appropriate work zone layout to use for low-volume urban and rural roadways based on the maintenance activity that will be performed.The documents are intended to supplement the Temporary Traffic Control Zone Layouts Field Manual (dated January 2014).
The full report also includes a summary of work zone resources and training opportunities as well as a copy of a letter that was written and submitted to the MN Committee on Uniform Traffic Control Devices in April 2016 requesting changes for low-volume roadways. For more information, please visit the following links:
Temporary Traffic Control Report
Field Manual (Rural)
Field Manual (Urban)
MUTCD Request Letter
For a color PDF information sheet, click here.
June 13, 2016

FY 2015 LRRB At-a-Glance Now Available

The FY2015 Local Road Research Board At-A-Glance is now available. In addition to serving as a quick reference guide to our research program, this document also contains research highlights, budget summaries and videos. Feel free to contact for printed copies.
February 29, 2016

Younger Drivers Toolkit for Local Agencies

Traffic crashes are the leading cause of death for Minnesotans under the age of 29. This new MnDOT/LRRB publication provides city and county transportation staff with information to help engage local communities in improving safety for the state's highest risk drivers. The toolkit provides research explaining attitudes and motivations for high-risk driving among 15- to 29-year-olds and strategies to promote change, including policy, outreach and enforcement. Specific resources include sources for public service announcements, partnership opportunities. An associated PowerPoint presentation can be tailored for specific programs, and a PDF flyer summarizes the toolkit and associated resources.

View Toolkit
View PowerPoint
View Flyer
View Technical Summary
September 17, 2015