Older trailers must have the reflective tape or array of reflectors retrofitted by June 1, 2001.

The 10 is part of the rating system for identifying fire fighting capabilities of the fire extinguisher. It has nothing to do with the size or pressure of the extinguisher.

All CMV’s after July 5, 2005 must display the carrier ID Number preceded by the letters USDOT. All other identifying information may be displayed. (390.21(b)(2)(4))

For CDL purposes the difference is very important. Careless driving is not a serious traffic violation. Reckless driving may be a serious traffic violation if it is defined by the State or local law as one. If a driver has two serious violations within three years, his CDL will be suspended for 60 days. Other serious violations for CDL purposes are: speeding 15 mph over the posted speed limit, improper or erratic lane changes, following too closely, or a traffic control violation relating to a fatal accident.