Driving around Thailand's country side at night is considered to be extremely hazardous, especially on holidays and long weekends. There are no tachographs installed and although drunk driving is being addressed, the situation is far from safe. Many cars have broken, or no lights at all and public busses like to race one another through steep hills and around dangerous curves, supposedly just to stay awake. Low wages, too many daytime checkpoints and very tight schedules for truck- and bus drivers guarantee that all of the main roads and highways have 24 hours rescue teams on stand by and that most of those need to head out to big accidents every single night.
It was just a few years ago when it was possible to purchase a driving licence without passing any test whatsoever and a lot of the licensed drivers from that period have failed to gain sufficient experience to drive safely and are still out there...