Hey, wait a second. If a measly second can really make that much difference, why do most traffic lights still feature yellow lights quicker than a roadrunner on speed? If a fix is this easy, wouldn't it be in everyone's best interest to implement it ASAP?
Well, no. Turns out, keeping yellow lights short and sweet equals big time dough. For cities using red light cameras, drivers running the lights represent a fairly substantial chunk of revenue. In Dallas, for instance, the cameras have been known to raise $700,000 in fines ... within a few months. For this reason, yellow traffic lights in such cities actually tend to be quietly calibrated even quicker than usual.