Issues:

Cars:

size, location, distance

Handicapped: where located, required
Trucks:

box, trailers, tandem

Isle Width: minimum radius
Drive Lane: direction, width
Garages: ramps, style, height
 
Most Cities & Towns require a minimum number of parking spaces based on the use within a City or Town.  The size of the parking space may vary from town to town.  The size of a drive lane can vary also.  In some locations, compact cars spaces can be substituted for standard ones.  Handicapped parking is required for all Cities & Towns and the location can vary.  Parking lot aisle widths may also vary.  In the City of Boston, for instance, the only requirement related to drive lanes & aisles is that a car can safely maneuver to all required parking spaces and through parking lots.