My PrePass beeps red, I go in. PrePass beeps green, I'm not going in irregardless of what the signs say. Unless it's hazmat in Arizona or the Buckeye, then you gotta go in no matter what.
And I drove by Arizona forever with placards in ignorant bliss. I ask bear once if I needed to go in with them and he says "Green means go." So I always went lol. Someone on here pointed it out, and posted the PrePass link, and sure enough gotta go in, in AZ. So I looked on Landstar site and verified it.
If ANYTHING tells me okay to bypass, or closed... I'm gone. Regardless of the other signals. If the ramp is full... I'm buggin'. But, that's me.
I see that you're from Oregon and this has been a problem there for years. It's kind of an unwritten rule up there that you follow the sign on the highway and ignore the prepass if it says to enter. There are 3 scale houses in Oregon on the I-5 between California and Washington, and none of them have a reader board that tells individual trucks to bypass the scale. They either say "open" or "closed". You don't see those until you cross over into Washington, and I've never seen one that told me to bypass when my transponder said to enter. Oregon DOT agents are notorious for leaving the transponder switch on even after the scales are closed and nobody is there. I've ignored the transponder up there for years and never had a problem. I did ask a highway patrol once who was being a jerk because I pulled in when the sign said closed. He said if the sign says closed stay out. It's different in practically every state.
Yep, that's the middle scale house on I-5. You see that every day up there. Sign says closed and the transponder gives you a red light. Notice that every truck except this guy bypassed? It's just how they do it up there.