Traffic Sign Maintenance/Management and Sign Retroreflectivity Training

Traffic signs

Date and Location

Not currently scheduled.

About the Workshop

This workshop will provide participants with an overview of sign retroreflectivity assessment and management methods, as well as guidance for developing a sign inventory and understanding the crashworthiness of sign posts. Participants will learn about federal regulations, various sheeting materials, and how to determine the right assessment and management method for their agency. Also, attendees will learn learn how to conduct the various sign retroreflectivity assessment and management methods, including nighttime inspection. Participants are encouraged to bring in a used sign to test in the class.

Topics Covered

  • How federal sign retroreflectivity regulations apply to you
  • Various methods to meet these regulations
  • Crashworthiness of sign posts
  • Conducting various assessment and management methods on your own signs with confidence
  • How to decide which method is best suited for you and your agency

Who Should Attend

This training is designed for county, city, and township sign maintenance staff.

Course Instructors

Kenneth Schroepfer is a transportation program specialist in the Minnesota Department of Transportation’s Office of Maintenance. He has more than 40 years of experience in traffic engineering at MnDOT's Office of Traffic, Safety and Technology. This included 35 years working on highway sign design, traffic standards and manuals, and delivering numerous presentations on sign retroreflectivity. Since retiring in 2014, he has worked in the state sign shop, where his responsibilities have included helping develop the Plural Component (Epoxy) Striping Training Manual and assisting in the fabrication of highway signs.

Sulmaan Khan, PE, is a senior engineer in the Minnesota Department of Transportation’s State Aid Office. He has worked at MnDOT for the last 10 years, including time as a student worker, a rotating graduate engineer, and his current position in State Aid. Sulmaan’s role in State Aid is focused on working with local government agencies on traffic safety-related programs and initiatives with a goal of reducing fatal and serious injury crashes on local roadway systems.


This workshop qualifies for 1.0 Roads Scholar Program Maintenance Certificate credit.


This workshop is presented by Minnesota LTAP at the Center for Transportation StudiesUniversity of Minnesota. Minnesota LTAP is sponsored by the Minnesota Local Road Research Board (LRRB) and the Federal Highway Administration (FHWA). This course is subsidized through funding from LRRB and FHWA.