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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The Enhanced Culvert Inspections Best Practices Guidebook is a primer on common culvert inspection technologies and applications. The manual summarizes the advantages and limitations of each technology and provides best practices when planning for and implementing an enhanced inspection project.
A new user guide provides simple, cost-effective methods for stabilizing locally maintained slopes along roadways in Minnesota. Eight slope stabilization techniques are presented that local government engineers can undertake.
The purpose of this guide book is to provide easy-to-use steps for calibrating snowplow sander controllers. It is an experience-based guide that captures tips and techniques learned by experienced calibrators. It helps agencies calibrate their sander controllers so the correct amount of salt, sand or other solid material is applied to the road when treating roads during winter maintenance. The guide also includes calibration forms, and a general discussion about calibration.
This project aimed to develop guidelines, curriculum, and training on the use of best value methods for procurement. The resulting manual promotes a consistent procurement and proposal process for the benefit of both agencies and contractors.
The Minnesota LRRB has developed a Sign Retro Reflectivity Toolkit to provide local governments,
especially small cities and townships, with guidance and resources to meet FHWA’s sign retroreflectivity deadlines.
This guidebook is intended to help engineers select and deploy LED stop signs and ICWS at STOP-controlled intersections. These safety strategies should be included for consideration along with other safety improvements detailed in the TEM and Traffic Safety Fundamentals Handbook.
This handbook summarizes common snow and ice control tools and serve as an introduction to the field of winter maintenance for operators and managers.
This handbook aims to reduce the number of severe crashes on the state’s highway system by helping agencies design, operate, and maintain their systems of roads and highways. A spinoff from the ongoing County Road Safety Plan efforts, this resource contains traffic safety strategies, sample policies and best practices information to support agencies as they implement their own policies.
A new guidebook is intended to help engineers select and deploy LED stop signs and ICWS at stop-controlled intersections.
The manual will assist communities and planners to not only select the best trees for their available planting sites, but to use specific principles of street tree design to most effectively create public green spaces, positively affect traffic patterns, and create healthy living spaces.
This tool, which can be used at the project scoping stage, assists city and county public works staff in the selection of best management practices appropriate for specific projects. This tool walks users through five steps in the selection process, and is intended for use with projects that don’t have a regional stormwater facility available.
This document presents guidelines for Minnesota county
engineers on how to interact with developers of “wind farms” (technically known as large wind energy conversion systems or LWECS). However, county engineers in other states, other road authorities, and wind power developers themselves also may find this information valuable.
This booklet is intended to aid local and state highway construction, maintenance, and design staff understand the potential causes and possible remedies for bumps that occur during overlay construction.
This resource guide was created to supplement the Minnesota Stormwater Manual in regards to local government inspection and maintenance activities associated with various BMP categories. It can be used as a tool by city staff and policy makers for evaluating various BMPs to install based on anticipated long-term maintenance requirements.
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 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.
This revised Seal Coat Handbook is intended to be a practical tool for the designer and the technician.
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.
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.