The taxicabs in New Orleans do not have the taxicabs Number in the roof light. They are on the front and rear bumpers. While this was filmed on location, all of the taxicabs filmed had to have New York City roof lights installed, as part of the plot relied on this. The majority of the taxicabs however, were real local taxis, or automobile extras, If you like. The taxicabs that did volunteer for the service, were mostly independently owned and not fleet taxis, as the majority of them have advertising signs on the roof. Also Medallion Cab Company does not exist. Yellow, Checker taxi, and United cab company are some of the bigger New Orleans taxi companies.
In the scene where Cage is driving through the parking structure, he jumps levels and in doing so visible dents the front end of the car, knocking out the right light. But later in the scene, the car is fine.