Great game! I normally don't like games like this but you did the things that just made it work for me.
While your traffic control scheme was more than a bit unsafe; the fact that you had any sort of effective traffic control at all was brilliant! I actually got a bit annoyed when a car did something to mess me up. I got rear-ended a couple times and had my routes blocked by fender benders. I had to pull off onto somebody's lawn to get around one when I was boxed in.
I also like how you have to park the bus by backing into your spot. Reversing a 2-part vehicle into a small space is certainly a feat worthy of being the final challenge. And how you skid when you're jack-knifed? Wonderful!