Rerecords: 1319+1169 for course 1, 2018+1423 for course 2 so far.
Course 2 isn't complete, since I got frustrated with traffic. While I did beat my previous course 1 time by over three seconds, it turns out the game is not as sync stable as I hoped -- Keeping the rest of the run intact, it desyncs halfway through course 4. Memory search does not turn up any different addresses other than score and X sub-position of lane-changing cars. Either it's something silly like the timing of the Program Counter or lane changing cars are my worst enemy.
Anyway, I may continue on this. For now, I at least have a complete run somewhere.