It's really good when it works, congratulations for your work. You must drive aware that sometimes the AI get involved in accidents causing a pile up on the street. Just wait (out of the way, if possible) until another AI comes and hit them clearing the path.
Also, dunno why, but on half of my tries the race is just cancelled and I'm back to CM after waiting the 10 min loading time (the car appears rapidly right at the end of the loading process and the AC closes and I get the message that the race was cancelled). Other times, it just works fine. Any hints?