I've never been billed for driving on Colorado toll roads.
is your address up to date with the state?
I think so. I get my tag renewal form in the mail every year at the right address, anyway.
check your credit report lately, rage?
Just did. Nothing stands out.
Do you live in CO?
No, Kansas. I've just assumed I wasn't getting billed because I'm out of state. I drive E-470 about once per year, but it's a round trip, so should be getting billed twice.
I think they still bill out of state but are notorious for messing up the billing (not sending). If your credit doesn't show anything and you don't live in CO, I wouldnt worry about it till unless it comes up. In Colorado they will hold your registration/license renewal if you don't pay.
Also, depending on how far on 470 you go, you could be billed 4 times for a round trip cause there's two seperate billing areas north and south of 70.