Not so much a speed trap as a light trap. These odd MVD traffic enforcement people jiggered the lights so someone heading northbound sits at a red for about 30 seconds while the other way is *also* red. Designed to trick people who look at the light going the other way to figure out when to go. Not sure about the frequency, but this is the worst kind of trap: one that creates a "crime" when there wasn’t one before. And APD is apparently learning tricks from the state folks (do they have seminars on "Bamboozling hard-working tax-paying citizens?") as I have seen them run a "light trap" on the light going into Wilson Stadium at Manzano here in Albuquerque at least 3 times.