Fox being red-green color blind

I'm just curious, but wouldn't Fox being red-green color blind make his job as a FBI agent harder. Doesn't red-green color blind mean you can't see red or green and if so then how would he be allowed to operate a vehicle. He would run every red light. I mean somebody could tell him if it was red or green, but still I would think this would be some sort of disability to a FBI agent. What do you guys think?