Centerline Rumble Strips
Centerline Rumble Strips are applied to single lane undivided highways to help prevent head-on collisions. These are often milled.
A 2005 NCHRP study concluded that overall motor vehicle crashes at sites treated with Centreline Rumble Strips were reduced overall by 14%." In these situations the opposite lane and any paved shoulder would function as a generous recovery zone. However, this study didn't investigate changes in crash severity as the 2005 Montana study.
It is interesting that the Centerline Rumble Strip reduction value is the same as the 2005 Montana CSRS study that indicated a 14% reduction in accidents on Interstate highways. This supports that the overall effectiveness of CSRS with a generous recovery zone is about 14%.
Ice and slush filled rumble strips can be a concern but particularly so be milled centerline rumble strips and for that reason some jurisdictions are reluctant to install them.
Read more about this topic: Rumble Strip
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