The Federal Highway Administration has identified centerline rumble strips as a proven safety countermeasure to head-on and sideswipe opposite direction crashes. The 2005 National Cooperative Highway Research Program (NCHRP) Synthesis 339 found that head-on and sideswipe opposite direction injury crashes were reduced by an estimated 25% at sites with centerline rumble strips. Federal Highway Administration - Centerline Rumble Strips
The Washington State DOT determined that the installation of centerline rumble strips have resulted in a 37% reduction in all crossover collisions, and a 57% reduction in crossover collisions with serious and fatal injuries. Washington Highway Safety Report - Centerline Rumble Strips
The most comprehensive study to date was published in 2009 in NCHRP’s Report 641 “Guidance for the Design and Application of Shoulder and Centerline Rumble Strips”. This study also supported previous findings that centerline rumble strips are a cost effective safety countermeasure that are safe for all highway users. In this study, fatal and injury head-on and opposite direction sideswipe crashes in urban areas were reduced by an average of 64%, and in rural areas were reduced by 44%.
NCHRP 641 - Centerline Rumble Strips
At the time of publishing of the NCHRP’s Report 641, 29 States have installed centerline rumble strips, and since them numerous more States have installed centerline rumble strips, including New York and all of the New England States.