They narrow a perfectly good shoulder. What’s more they capture debris which spreads across the remaining rideable surface and finally, they don’t prevent that distracted driver from hitting a cyclist. But there may be more rumble strips in our future according to this blog from the League of American Bicyclists.
With funds from the American Reinvestment and Recovery Act and Tiger Grants, rumble strips may be coming to a road near you. The League of American Bicyclists is working with Adventure Cycling and the Alliance for Bicycling and Walking to make sure states follow FHWA guidance to minimize the impact of rumbling strips on cyclists. Adventure Cycling’s Jim Sayer wrote an excellent account of the groups’ meeting with two officials Federal Highways. (It includes this listing of rumble strip practices by state.)