Made cars move smoothly at intersections!

This was an absolute nightmare to do. Mostly because my previous code was not designed at all to do this. I had to hack together a solution where below a certain threshold the car is in the intersection. This has some side effects of sometimes the car goes slow in the intersection and sometimes fast, but I think its reasonable (tighter curve = slower?).

The biggest issue is that my code was designed assuming the two roads on the intersection were symmetrical (idk why i did that) so I had to basically re write the whole intersection code.