Q. Standards for Reflective Warning Devices/Triangles in Commercial Vehicles
Federal Motor Vehicle Safety Standard (FMVSS) 125 covers warning devices. In brief, the standard applies to devices without self-contained energy sources that are designed to be carried in motor vehicles and used to warn approaching traffic of the presence of a stopped vehicle. You can access this standard at: http://www.gpo.gov/fdsys/search/pagedetails.action?browsePath=Title+49%2FSubtitle+B%2FChapter+V%2FPart+571%2FSubpart+B%2FSection+571.125&granuleId=CFR-2011-title49-vol6-sec571-125&packageId=CFR-2011-title49-vol6&collapse=true&fromBrowse=true
All FMVSS can be found in 49 CFR 571.
For additional information, please contact the National Highway Traffic Safety Administration's Office of Vehicle Safety Compliance at (202) 366-5291 or OVSC@nhtsa.dot.gov .
For information on the use of warning devices for commercial motor vehicles,