I would do what Randomperson said. Thats what I do...The only problem is sometimes the vehicles seemed stuck together...in that case idk wat to tell u...I just go to main menu and reload or start a new freeplay. Lately I have been facing peds standing in the road I just move them when that happens...also make sure that the police and/or ambulances arent just sitting in the intersections stopping everybody...I hope it works dor you