Quote Originally Posted by Bob63
Marmite OK, then the link is wrong about highways.
Driving in Thailand & Rules of the Road - AngloINFO Bangkok (Thailand)
It seems so, yes.

You do find that the Thai police like to make stuff up in an effort to relieve you of some cash, so often it doesn't matter what you've done. They even lower the tollway speed limit to 80kph near Don Muang in order to get more 'offenders'.