I came across article on rumble strips. Driving on roads where cars and trucks are present is something that I avoid as much as possible. The rumble strips are nice but with all the distractions in cars such as texting, eating and drinking, I never will feel safe riding alongside of any motorized vehicle even with rumble strips. Still if I had to make an exception I would choose a road that conformed to the latest FHWA standards.
Based on Federal Highway Administration (FHWA) standards and the studies/reports noted below, these are the rumble strip best practices recommendations that provide the minimum standards to safely accommodate bicyclists:
- Shoulder width: No rumble strips or stripes installed on shoulders less than four feet
- Placement: Adjacent to or on the white line, providing a minimum of four feet of usable shoulder to the right of the rumble strip
- Frequency: 6-foot gaps allow cyclists to navigate away from the shoulder if needed
- Depth: 0.375 inches
- Width: 5 inches
- Length: 6 inches
Federal Rumble Strip Guidance
The Federal Highway Administration (FHWA) released updated guidance on rumble strips in the spring of 2010 that was a big step back for cyclists’ safety. Partnering with the League of American Bicyclists and the Alliance for Biking and Walking, we were able to work with FHWA to improve their guidance for cyclists and a revised Technical Guidance was released in November, 2011.