Dynamic curve warning signs (DCWS) are low-cost technology solutions to help drivers select an appropriate speed when approaching a horizontal curve. DCWS systems generally consist of a warning sign combined with a speed measuring device (e.g., radar) that activates a variable message (e.g., slow down) when vehicles are traveling above a set threshold.

This project was proposed as a supplement and expansion of an ongoing Federal Highway Administration (FHWA) national DCWS field study and evaluates the speed and/or crash impacts of three permanently installed DCWSs in three Minnesota counties: Freeborn County, Meeker County and McLeod County.

Benefits

· Improvement to the background, knowledge, and guidance related to the implementation and potential impacts of these new sign devices

· Supplement the ongoing national study with lower volume sites in Minnesota

· Provide information that can be used to decide whether the type of sign evaluated should be implemented and its expected speed and/or safety impacts.