Local Road Research Board News
 New Guidance for Creating Green, Leafy Boulevards
 A new video highlights the LRRB guidebook, Best Practices for Boulevard Tree Selection, which features recommendations for selecting, planting and maintaining street trees and for encouraging community support.
GUIDEBOOKS
Rural Pedestrian Crossings
With increasing trends and public requests for crosswalks, agencies are seeking resources on best practices for pedestrian crossings to improve safety, comfort, and consistency of the transportation network. This guidebook provides a comprehensive overview of rural pedestrian crossings for both pedestrians and drivers by examining Minnesota statutes, summarizing key features of pedestrian crossings, synthesizing findings from existing research reports and studies, and integrating other relevant resources.
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Guidelines for Determining Speed Limits on Municipal Roads
Reducing speed limits to increase public safety is a controversial issue. A 2019 statutory change put a spotlight on the topic, requiring a deeper look at how speed limits are established and the effectiveness that lowering speed limits has on reducing vehicle speeds. A new video outlines the LRRB guidebook, Guidelines for Determining Speed Limits on Municipal Roadways. This guidance examines the effectiveness of speed limit changes, outlines a process to follow when deciding to make a change, and offers alternative strategies for pedestrian and bicycle safety. |
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NEW RESEARCH
Warning System Cautions Drivers Against Running Red Lights
Running red lights is a major cause of traffic collisions and resulting injuries and fatalities. While newer vehicles have many standard safety features such as lane departure warning and brake assistance systems to support drivers, they do not have technologies to help prevent driving through red lights. This project developed an algorithm that integrated traffic light phasing information with GPS data to warn drivers when they were approaching a red light, providing valuable driver assistance and improving traffic safety and efficiency. |
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Pedestrian Safety and Accessibility Best Practices for Channelized Right Turn Lanes
The use of channelized right-turn lanes at intersections can improve driver safety and traffic mobility but can be challenging for bicyclists and pedestrians, particularly those with sight or other impairments. This project examined the current practice of CRTs to identify design solutions and mitigation strategies to better accommodate the safety and accessibility needs of all road users. It offers guidance for the use of CRTs based on the project scenario and recommendations for traffic control, design features, and mitigation strategies intended to improve CRT safety and/or accessibility for vulnerable road users.
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Using Mobile Device Data to Estimate Bicyclist & Pedestrian Traffic
Constructing and maintaining safe road networks for bicyclists, pedestrians and other nonmotorized road users requires knowing the number and destinations of these travelers. Estimating these traffic volumes has been challenging because monitors are limited compared to vehicle traffic counters. Data from mobile devices, routinely collected through a variety of platforms, offers a potential source of traveler routes. Using monitored nonmotorized traveler data to validate mobile datasets, researchers produced a data visualization tool to estimate bicyclist and pedestrian counts within the Twin Cities area.
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GET INVOLVED
Share Your Expertise and Interests on a Technical Advisory Panel!
We're looking for city and county practitioners to serve on TAPs for LRRB projects beginning this spring and summer. As a TAP member, you will attend a limited number of meetings and review research results. You also will help determine the most productive ways to apply research results in the field. Make a difference without making a major time commitment:
- Project duration is usually 12 months.
- Attend 3-5 TAP meetings (virtual, 2 hours in length)
- Review materials and provide a local government perspective in making the research/deliverable practical!
Check out the list and contact us to sign on!
Environmental
Materials & Construction
Multimodal
Traffic & Safety
RESEARCH RADAR WEBINAR
Environmental Innovations
Thursday, April 17, 10-11 a.m.
Join MnDOT's Office of Research & Innovation and the Minnesota Local Road Research Board for the next Research Radar webinar. It's free and open to the public, registration required. We're featuring the following research projects:
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View recent Research Radar webinars
Submit Your Idea to Build a Better Mousetrap - Deadline May 16
Have you or one of your co-workers recently built an innovative gadget or developed an improved way to do a job? Show off your creativity and help other agencies solve problems by submitting an entry to the Minnesota Build a Better Mousetrap Competition.
Your entry can be anything from the development of tools or gadgets to equipment modifications to processes that increase safety, improve efficiency, reduce costs, or improve the quality of transportation. The Minnesota competition is sponsored by the Minnesota Local Road Research Board and administered by Minnesota LTAP.
Submission deadline is May 16, 2025. To learn more and submit your entry, go to Build a Better Mousetrap Competition.
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LRRB UPDATE
2025 Minnesota Transportation Conference is in the Books!
It was great to see so many colleagues and friends at the 2025 Minnesota Transportation Conference & Expo last week! Thank you to all who stopped by the LRRB/ MnDOT booth to chat, pick up our latest guidebooks and check out the new projects we highlighted - go here to learn more and subscribe to project updates. Photo at right (l-r): Briah Carlson and Elizabeth Arndt, MnDOT, staff the booth.
The LRRB project, Expanding the Transportation Workforce: Roadway Maintenance Workers, was featured in a conference session in which project leaders discussed the development and launch of the new transportation career website, Minnesota Transportation Maintenance Careers. A project of MnLTAP and the LRRB, the site is designed to help local agencies and jobseekers connect. Pictured (l-r): Mark Ray, City of Burnsville and LRRB member; Katherine Stanley, MnLTAP; and John Siqveland, Center for Transportation Studies.
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CONFERENCES & TRAINING
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Freight 101 Webinar Series: Rail, Center for Transportation Studies, March 27, virtual
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Freight 101 Webinar Series: Urban Freight Delivery and Logistics, Center for Transportation Studies, April 3, virtual
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Excavation and Trenching Safety in Roadway Construction: Unearthing Risk Management, Minnesota LTAP, April 10, virtual
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NRRA Pavement Conference, April 22-23, Shoreview
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Minnesota Roadway Maintenance Training and Demo Day, MN LTAP, May 29, Cloquet
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MAASTO 2025, Aug. 25-27, Minneapolis
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2025 CTS Transportation Research Conference, Nov. 6, Minneapolis
Check the Status of Your Research Idea
If you submitted a research idea to the Local Road Research Board, you can check its status on the LRRB Idea Tracker, which shows the status of ideas submitted over the past year. Just search by your name or project name to locate your project.
 Minnesota Local Road Research Board • lrrb.org
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