What do yall run? I have both and been trying to test it. I'm not sure if they use the same info to determine who gets red lights or green lights. I've got red on prepass and green on drivewyze and vice versa. Of course either of them give me a red, I have to pull in. I'm just testing it. Seems 100% random to me. I'm testing it because my prepass has broken or malfunctioned on me 8 times in the past 2 years and I have to keep sending it in and getting replacements.