Edit: to clarify, even if you ignore all the household issues to deal with (eg "electricians" saying "what's that third wire for" is common) Thailand is number four on the most dangerous places to drive list. http://www.telegraph.co.uk/travel/maps-and-graphics/most-dan...
Outside of Bangkok, the following are just accepted norms for driving:
• no seatbelts
• no child seats
• ignore stop/give way signs/traffic lights
• drive the wrong way on the side of the road (applies to vehicles of all sizes)
• no understanding of how roundabout works (enter without looking, force existing traffic to stop for you)
• drive at 150kph+ on a 90kph road
• ignore marked turning/straight lanes, cut across non-turning traffic to make turns at intersections
I've seen kids drive better in GTA than some people do here.