Damn... That's crazy. This is an excellent reason why people should not own cars in China.
Well I just read an article saying some people are taking advantage of this and selling food and water to people stuck in the traffic, at inflated price, maybe there are portable toilets or showers available? Hell if it was me i'd go to a hotel.
Assuming you can get off the highway....
Try Australia, Brisbane. 2 minute waiting and only 15 secs of green light to go.well sometimes it depend on the intersection which cause traffic jam. In guang dong some intersection are retarted where the Red light from North and South direction could be 50 sec and then only aloud 12 sec for a green light. The other direction get better timing eventhough not too many traffic on it