Accident Puzzle resolved

Horst from The Aardvark Speaks today posted an accident riddle. He ear-witnessed an accident, and later on saw how the two cars were aligned. Somehow, the alignment didn’t make sense, so he sketched the scene and asked for help. Well, I took it upon me. I hope he’ll forgive me for not drawing my own sketch in order to provide my answer:

Right, so here’s the answer. Green Car wants to, illegally, turn left. Blue car, illegally, wants to go straight ahead, in an effort to quickly cut through the one-way street. Neither of the drivers think something could go wrong, since they expect everyone else to abide to the signs. They don’t look out for other cars, thus crashing in the manner drawn above. Green Car hits Blue Car in the side, both skid to the curb. Riddle solved.