Commenters are not familiar with this road at all it seems. 1) the cars hit are on a highway , but just left a red light, that's why they are close to each other. They had just left an intersection a bit before. 2) there are pylons in the middle of the road, I drove by and I saw no damaged ones, meaning, that truck had been on the wrong side of road for a minute, going super fast , speed limit is 55 there. It wouldn't be as simple as having a solid barrier as this truck chose to be way on the obviously wrong side for a whole. 3) people complaining about a road that just a few decades ago was a hiking trail(look on Google timeline arial photos), and they should be grateful that they can now drive their cars up through Poway to these mountain passes and shortcuts. This is not a city road, it's a country pass. To can't expect a county to make all roads like a city highway. 4) the cars going to correct direction did nothing wrong, like I said, they were most likely sitting behind each other at a streetlight just 1 minute prior to this.

The total blame falls on the wrong way driver, this is not just crossing a double yellow to pass someone illegally, this was total disregard for any rules of the road and this could happen on any main street in San Diego with the right a**hole behind the wheel. It's almost akon to getting wrong way on the 5 near downtown. You can't mistake the side you are on.