What is the spacing of RPMs in the transition area?

The correct spacing of raised pavement markers (RPMs) in the transition area is established to enhance visibility and guide road users effectively through areas where they may need to adjust their driving, such as approaching work zones or detours. The specification of 20 feet center to center ensures that markers are sufficiently close together to provide continuous guidance, especially in situations where traffic patterns are changing, and drivers need to be alerted to new road configurations.

This spacing helps drivers maintain awareness of the intended path, reduces the potential for confusion, and enhances safety by marking the transition area clearly. When RPMs are spaced too far apart, drivers might lose visual cues and may not react appropriately to any changes in the road environment. Therefore, using a spacing of 20 feet is crucial for maintaining effective communication to road users, particularly in transition areas where clarity of direction is important.