The southbound lane, which was a new road to widen the previously single lane highway is still in relatively good condition. I guess it is a dream to have the current government spend any money on this when they are too busy building super highways through deserted rice fields in Issan, never mind the only major road artery between Bangkok and Singapore ... but yes, that's in South Thailand.

Another observation is that highway driving standards seem to have improved slightly (repeat: slightly) over the years, car drivers tend to leave a little more space now, are not travelling at breakneck speeds all the time, and on occasion show a little courtesy to other highway users (this doesn't apply to driving standards in Hua Hin town which are as bad as ever). Of course you'll always get the odd twat in an over-powered pickup that thinks he has a touring car but they tend to be in the minority now. The trucks are just as inconsiderate and dangerous as ever, swerving into the outside lane without even looking, but in general the car drivers 'appear' to be getting better.
Also noticed a LOT more red plates on the road, it seems in Thailand a brand spanking new car is becoming a common household item these days.