I am late... very.
The map is alright, except for the alley part, as it may cause trouble for non-maxed cars (especially starter cars). [also the alleys are just infuriating to drive through] If this was my map, I'd have changed the route to avoid the overly bumpy alleys.
Regarding the visuals...
1) please don't put [cop] cars all over the place, not only does it not look good eventually, but it also makes the map unsettling to drive on;
2) not every arrow turn must have something behind it, you don't organize street races only when there's chaos on the street;
3) don't go mad with details. Simple additions should be enough.
P.S. Reverse and Forwards do not necessarily have to be -exact- same, you can rotate the tube near finish line in Reverse, for example.