Bangkok is notorious of it's terrible traffic jam.
Surprisingly, the road condition is very well. No even a small hole on the road. Drivers are patient and friendly, you will rarely hear car-horn sound even during traffic jam. When you want to overtake , they will give you way instead of showing you frustrating expression .
The road shown is Rama 1 Road, it has 5+1 (2 ways) lanes. Taxi drivers can easily cross lane by lane in very short distance. My experience was the taxi driver cross 5 lanes in less than 70 meters and make an U-turn to the next lane(opposite direction).
Taxis are the most colourful vehicle on the road, there are yellow+green, blue+red, white+blue,blue ... different kind of taxi. However, all taxi fare meter starts counting at 35Batt (US$0.9), it's relatively cheap compared to other cities.