The Local Road Research Board publishes a wide range of transportation-related educational materials. Our most recent and popular guidebooks, manuals and courses are available below. For all research reports, go here.
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This guide provides easy-to-use steps for calibrating snowplow sander controllers. It includes quick calibration sheets, calculation worksheets, and blank calibration forms for both manual and automatic controllers.
This video was developed by the Minnesota Local Roads Research Board to inform the public about the many factors to consider when developing a plan to maintain or upgrade a gravel road.
This manual, a reformatted version of LRRB Manual 2005-33, has been designed to be used as specifications for concrete repair of local city streets and county concrete pavements. It is intended to be used as supplemental specifications for constructing this work throughout the state of Minnesota.
The Minnesota Crash Mapping Analysis Tool (MnCMAT) enables users to analyze crash data based on a number of attributes.
This revised Seal Coat Handbook is intended to be a practical tool for the designer and the technician.
This video discusses load limits, which are calculated using current pavement design and the amount, type and weight of the traffic using the road. These limits are set to protect our significant investment in transportation infrastructure.
This video discusses the safety and design features that are used in modern roundabouts.
The purpose of this Web tool is to assist the engineering community in the design of hot mix asphalt (HMA) pavements.
The use of warranties in roadway construction is a hot topic at the state and local level. Agencies across the board are looking for innovative ways to deliver construction projects and reduce maintenance costs and time commitments. This report examines how warranties may offer some relief.
Download this PowerPoint document to learn about what it takes to build a career as a civil engineer or technician.
This video discusses what a civil engineering career is, and interviews public- and private-sector engineers in Minnesota about their projects and experiences.
Here you’ll find resources for anyone considering a career as a civil engineer.
This manual will assist counties, townships and local units of government by providing guidelines and methods for effective erosion control practices on low-volume roads.
This video, designed for second and third grade children, tells the story of 10-year-old neighbors who had a near-accident with a snowplow. City and county public works departments are encouraged to visit schools in conjunction with this video to build connections with their communities and take an active role in safety.
This field manual provides guidelines for preventive asphalt pavement maintenance techniques for a variety of distresses and conditions.
This handbook was written to provide guidelines for effective management of roadside vegetation for local agencies, and highlights seven best management practices (BMPs) that were identified through research, surveys, and discussion with industry experts.
The purpose of this handbook is to provide background information about the importance of pavement preservation and preventive maintenance, as well as present maintenance techniques for a variety of distresses and conditions.
This 14 minute video provides an overview of the causes of potholes and repair methods. Three types of patching methods, permanent, semi-permanent and temporary, are presented along with the guidelines for selecting the most appropriate techniques.
Using a series of dramatic crash-test clips, this video illustrates the potential dangers of mailbox installations on high-speed roadways, and suggests safer, cost-effective alternatives to standard wood posts and other designs that penetrate windshields on impact.
This video explains how using research-tested repair techniques and materials saves money, headaches, and time for both drivers and public agencies. It also serves as a educational refresher for maintenance staff.