This is an excerpt from advice we give to novice drivers venturing on to the roads on Chiang Mai and the north - a very rewarding experience!
TIPS: A few things to leave behind when on the roads of Thailand;
A need to rush.
A sense that some foreign or Thai rulebook will cover every situation and protect you - it won't.
An attitude that you have a decreed "right to the road" - you don't.
link to here for full article;