The "County" Retroreflective Raised Pavement Marker ("County Marker")

Case ID:

The invention, known as the County Marker, is an innovative variation on the retroreflective raised pavement marker (RRPM). The unique design features two yellow retroreflectors that produce a double yellow signal when viewed at night. The design can serve as a no passing zone line.


Standard RRPMs are currently on the outside of the double yellow lines and may be used as a substitute to separate opposite directions of traffic. RRPMs have value in guiding drivers and increasing safety. The Federal Highway Administration has proposed new rules on pavement markings in the Manual on Uniform Traffic Control Devices, presenting an opportunity for the County Marker to enter the market.



  • Traffic control products
  • Professional pavement products
  • Traffic safety industry



  • Saves money by using one RRPM for both passing and no passing zones on highways
  • Increases efficiency and saves time when constructing roads
Patent Information:
Contact For More Information:
Tariq Ahmed
Sr Licensing Manager, College of Engineering
The University of Arizona
Lead Inventor(s):
Seth Chalmers
Garrett Anderson
Dean Papajohn
Vincent Morello
Lindsey Willman
Lauren Fecteau