thats a good question, get to that in a minute.
in the video, the bridge (skinny section, the screen looks perfect, and the night driving section looks pretty close to perfect, but the other roadway and skid section (?) look like a black section rolling top to bottom, and the rest looks like dark green sectons with vertical striations in the colouring of the roadway.
does the roadway look perfect to you in game play ?
and do the black sections rolling top to bottom appear to you or is that the camera ? if it does appear to you then that could be rom/prom issues, so if you have a rom burner, maybe you could dump them and compare them to the proms avail online ? that will tell you if the proms are ok and to maybe look to the sockets next.
collision detection. hmm. i reviewed the first video again and i see what you mean. and the second. no skidding on the verges, and no collisions.
do you get the car engine acceleration sound ? i couldnt specifically hear it, but i did hear the "other car sound" but also no emergency vehicle sound. does the monaco gp do the skidding like turbo ? (car "rotating" a few degrees back and forth).