For those who think traffic in Thailand is bad - they should try some hours in indonesian traffic! The main differences are that indonesian roads are in general in much worse condition, they mostly have only one (very narrow) lane in each direction - thus traffic will be like in the clip from 3.32 and onwards. Just freakin crazy! And add up that there are a whole lot more people and thus traffic living in Indonesia than in Thailand. Java has around 145 million inhabitants and thats more than twice as much as Thailand and Java is only 25% of the size of Thailand.
If you imagine Thailand had 600 million inhabitants and the road standards of Indonesia - you will get the picture...?