Much of the north-south route is dual carriageway.
Road signage follows international convention and usually are in Thai and English.
Often the smaller roads, known as Sois, are in Thai only. Night driving is not recommended on the open road due to heavy truck traffic, which tends to have little respect for cars. Motor bikes can also a hazard, particularly as they are often ridden into oncoming traffic. Driving on the most of the major routes outside Bangkok and around resort areas is both a safe and an enjoyable experience. A self-drive holiday offers the opportunity to experience wonderful Thai culture and the opportunity for travellers to stop as long as they like at the many points of interest in the Kingdom.