For new highways, is the recommendation to place both shoulder and centerline rumble strips?
As applicable, yes. For example, on a two-lane road that has adequate space for both centerline and shoulder rumble strips within the policy parameters, we would recommend the use of both. Freeways on the other hand, do not have centerlines, but it is recommended that the shoulder rumble strips be placed on both the right shoulder and the left (or median side) shoulder.
Related Questions
- Does the guidance recommend shoulder rumble strips only where a clear 4-foot surface is provided beyond the rumble strip?
- Why does the guidance not recommend rumble strips on multi-lane highways other than rural freeways?
- How do drivers react in locations where centerline rumble strips are used in passing zones?
