Minnesota Local Road Research Board
by LRRB
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.
by LRRB
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.
by LRRB
This video discusses how engineers develop reasonable, research-based traffic control strategies and apply engineering judgment to select speed control devices.
by LRRB
A short look at what the Minnesota Local Road Research Board does, and how it benefits city and county engineers, officials, and citizens.
by LRRB
This video looks at the issues that must be considered when designing roads in Minnesota, and how approved designs meet these three key issues.
by LRRB
In this video, meteorologist Mike Fairbourne explains the Four Ps involved in asphalt overlays: planning, preparation, production, and placement.
by LRRB
Quality seal coating requires both science in design and skill in application. This video shows emulsion and aggregate spreaders in action and explains the project management necessary to maintain an efficient seal coating operation.
by LRRB
The video discusses the differences between cracking filling and crack sealing and between routing versus sealing. Computer animation helps illustrate key concepts.
by LRRB
Using nontechnical terms, pavement material samples and other aids, a moderator explains how engineers gather data on pavement and underlying soils, then discusses the factors considered in making rehabilitation decisions.
by LRRB
While focusing on how pavement materials are affected by weather and loading, this video covers the basic concepts of pavement engineering, including fatigue, bearing capacity, and thermal expansion. It is a technical topic, designed for a general audience, with tabletop cross-section models to illustrate principles. Damage caused by overweight vehicle loads is also discussed.