A revised handbook offers Minnesota cities and counties the latest tips on how to meet new sign retroreflectivity requirements, as well as the 411 on sign maintenance and management – everything from knowing when it’s time to remove a sign to creating a budget for sign replacement.
The best practices guide – produced in conjunction with a new sign retroreflectivity study – also offers case studies from around the state.
“The life cycle of traffic signs, from installation to replacement, is a pretty complex issue and it can be a challenge to get your arms around,” said Tim Plath, Transportation Operations Engineer for the city of Eagan. “This handbook really boils it down into some basic concepts and also gives you the resources to dig deeper if necessary. It’s a good resource to have at your fingertips.”
This handbook updates a previous version issued in 2010, to include new FHWA retroreflectivity and maintenance and management requirements and deadlines.
“Maintenance/management of a large number of signs can potentially be an administrative and financial challenge for many local road authorities,” explained Sulmaan Khan, MnDOT Assistant Project Development Engineer.
Here’s a video demonstration of a sign life reflectometer (the Gamma 922), another resource MnDOT has available for local government agencies. Cities, townships or counties may borrow the reflectomer by contacting the Office of Materials and Road Research, (651) 366-5508.
Traffic Sign Maintenance/Management Handbook (PDF)
Traffic Sign Life Expectancy – Technical Summary (PDF) and Final Report (PDF)
Gamma 922 demonstration (video)