Truck Number Placement, is there a regulation I need to follow?

You don't have to display that number at all. The only things you have to display is company name, and USDOT number.

 

Unless if you haul into Canada then I believe it’s a requirement. I seen a guy getting yelled at for that (not having it) in New Brunswick one day.

 

I'm also pretty sure you have to display VIN if you're based out of CO. But barring specific situations like that, 99.99% of the time, you just need company name and USDOT.

 

I thought a “unit” # was required. Along with Name and USDOT#. Nothing else.

 

That’s probably where I got the idea. Sounds about right. Trailer doesn’t need a number. Probably same for Truck. I have the minimum, name, USDOT# and unit #. That’s all. I’ve heard “ fire extinguisher inside” is a requirement. Maybe. I’ve had them measure the size of my numbers in Ohio. They were 1/2” over minimum. I see some Big Megas with tiny Lettering. But Noooo, I get harassed.

 

The fire extinguisher thing is if you have it mounted in a box . You need that signage on the box…….
If it’s mounted next to drivers seat you don’t need it