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Flashing Yellow Arrow Signal Conversion Project

Project Status: 
2/26/2018: The project has been completed and final acceptance has been made for the Flashing Yellow Arrow Signal Conversion project.

7/14/2017:  All of the traffic signals that can be converted to flashing yellow arrow have now been converted.  One more detection device upgrade is anticipated at the intersection of Home Depot & Wentzville Parkway.  The remainder of the construction will focus on the ADA enhancements to improve pedestrian safety and battery backup systems to increase signal reliability.

A project is scheduled for Construction in 2017, to retrofit 10 signalized intersections throughout the City of Wentzville with flashing yellow arrow traffic signals. The Flashing Yellow Arrow Traffic Signal Conversion Project aims to reduce travel delays and vehicle emissions while increasing safety at intersections. This project will build on the success of implementing flashing yellow arrow signals at two other locations within the City of Wentzville. The following intersections on that list are expected to be upgraded with flashing yellow traffic signals:

  • West Meyer Road & North Point Prairie Road
  • West Meyer Road & Peine Road
  • Wentzville Parkway & Luetkenhaus Boulevard
  • Wentzville Parkway & QT Commercial Entrance
  • Wentzville Parkway & Meyer Road / Bridlespur Drive
  • Wentzville Parkway & Schroeder Creek Boulevard / Heritage Parkway
  • Wentzville Parkway & William Dierberg Drive
  • Wentzville Parkway & Crossroads Commercial Entrance
  • Wentzville Parkway & Home Depot Commercial Entrance
  • Luetkenhaus Boulevard & Pearce Boulevard

When construction commences in 2017, drivers should use caution approaching the intersections during signal installation. Temporary lane closures will be needed in order to replace traffic signals.

Benefits:  Flashing yellow arrows signal to drivers that they may turn left through the intersection when traffic is clear. The addition of flashing yellow arrows at an intersection provides more opportunities for drivers to turn left. This reduces the amount of delay a driver experiences at an intersection, which makes travel quicker and lowers emissions.

Flashing yellow arrows also can help avoid the “left-turn trap” where a driver creeps out into the intersection anticipating a turn on a green light, but gets stuck in the intersection when the light turns red. This improves driver safety.

Funding:  The Flashing Yellow Arrow Traffic Signal Conversion Project is 80% funded through the Federal Congestion Mitigation Air Quality reimbursement grant administered by the East-West Gateway Council of Governments and the Missouri Department of Transportation. The entire project is expected to be complete by August, 2017.



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