Last evening (1st Jan) the traffic jam extended nearly back to Denha Market (about 2kms). I was on my motor cycle so after some tricky weaving in and out of the cars and coaches I got to the river with relative ease, although a little gased with all the exhaust fumes.
The festival site was surprising quiet, it was only 7pm and I surpose most of the hordes of Bangkokians were still in the trafficjam. Also the shows had not started, and there where many free tables in the Singha Beer eating area. By 8pm it was a lot busier.
Getting out again was worse, as the exit road (there's a one way system) was very narrow and so no room for Mbikes to pass the two files of vehicles.
I strongly recommend not going there by car, unless early in the morning. However I think yesterday was the peak day and today our BKK friends are speeding back to their congested city, leaving our streets a little clearer.
They will surely have to do something about the traffic another time, or maybe the Thais are a good deal more patient than Lannaman!