Some of the work was done but a lot is still being worked on. Near the border you will find dual carriageways and the Hat Yai bypass. Further towards Bangkok the road again becomes dual carriageway. Beyond Bangkok conditions again deteriorate. The Thais are fairly relaxed drivers and are considerate of other road users.
Traffic is slower than Malaysia and the highways are mostly single lane roads.
Most traffic in the country consists of pick- ups, motor bikes and large trucks. Truck drivers do try to help those stuck behind them by using their indicators to signal when it is safe to pass. This is a widely used system which, works 9 times out of 10. I just wouldn't want to be the 10 th time when it doesn't work. Sharing the road Even where there are dual carriageways these are not always viewed in the same light as a freeway elsewhere.