Port Of Entry/Weigh Scales

This is a quick question I'm sure very easy to answer.

I drive interstate from Idaho to Utah. The Inkom, ID port of entry southbound is under construction so I go through 3 scales on my trips.

So there are two lanes in these port of entry's. One is where you go over the actual scales and it reads you your weight and you go no more than 5mph over the scales. the other you just drive by going like 10 or 15mph. I've ALWAYS gone on the right lane going over the scales that read you your weight.

But when I go through these port of entry's, sometimes (almost every time) The right lane has a Red X on the lights before you enter the scales like the left lane has a Green Check and the right lane has a Red X. And when I saw that the first time I thought it meant not to drive down that lane. Well I didn't get stopped. but on the way back I saw the same red X and a long line of trucks going over the scales so i waited in line and went over the scales.

I'm completely confused at this? What is the deal with the two lanes, the red x and green check?

Thanks if anyone can answer this question for me.

-Kenny

You're supposed to avoid the red x lane and go through the lane with the green arrow.

Exactly. That's them directing you were they want you.

Do they want to weigh you? They'll put you in the weigh lane.

Do they just want to take a look at you while you slowly drive? Then they'll put you in the bypass lane.

Be sure to always follow the green arrow. Not following the scale masters orders is a ticketable offense.

Exactly. That's them directing you were they want you.

Do they want to weigh you? They'll put you in the weigh lane.

Do they just want to take a look at you while you slowly drive? Then they'll put you in the bypass lane.

Be sure to always follow the green arrow. Not following the scale masters orders is a ticketable offense.

Thank you very much for your answer. I appreciate it. I will be heading out to Utah in 2 days so I will follow the arrows and lights this time.