From the Rama 9 tollway as you take the sliproad off to the right heading towards Cheng Wattana. When joining the highway to Cheng Wattana, the sliproad merges from the right.

Nearly every time I've been on this sliproad I've seen some of the most stupidest driving feats ever. At the end of the sliproad is basically a high wall. So many times I've seen a car nearly impaled into it, just to try and get ahead of the other driver also trying to join the highway.

Courtesy costs nothing. Amazing how the owners of these high-end Merc's can't even afford that.

/edit - Forgot to add - Any other suggestions for places that suit the above title?

I'd say it applies to each and every U-Turn, highway entry or exit...whenever some car has to get in or out of a flowing traffic. Thais in general (exceptions apply...) do not understand the concept of a slow down lane to exit a high way (slowing down on the main road instead), using the accelaration lane for joining a highway (going at slow pace to the end of that lane, being there stuck forever) or using the maximum available lanes for a U-Turn, some even topping it with some reverse gear action...

The other day i saw a guy in a pickup crawling along in the outside overtaking lane of the expressway as there was too much traffic flying down the inside lanes overtaking him for him to get across and make his exit. He finally came to a full stop before deciding that it was juct too dicey to almost u-turn to make that exit.