|The latest round of Rumble Strips, found here along Route 4 in Newark near the University of Delaware, have an offset of 2x what is specified in DelDOT's newly adopted Bicycle-Friendly Rumble Strips guidelines.|
As described above, the design of the rumble strip itself is critical. But when it comes to safety, its position relative to the lane is at least as important - if not more important. Bicyclists will still prefer to ride in the shoulder, behind the rumble strip. But the more offset it is from the white line, the less debris-free space remains. This will prompt more experienced bicyclists to ride in the offset, or take part of the lane (or the whole lane in this case) instead, to avoid tire puncture or loss of vehicle control.
|Edge line rumble strips, or "rumble stripes" are the overwhelming|
favorite among recreation and transportation bicyclists. The above
photo was taken in rural Pennsylvania.
In summary, we again thank DelDOT for revising the guidelines and giving us a much safer rumble strip. This is critical should bicyclists unintentionally ride into one, or need to exit the shoulder for any number of reasons. But we will not stop advocating that they sharply reduce or eliminate the offset, thus maximizing safe available shoulder space. To achieve compromise, the only thing we ask is that they follow the guidelines set forth in their newly released rumble strip design guidance, as they did here on Route 896 south of the C&D Canal.