I routinely drive from British Columbia to Denver, Co and back, sometimes pulling our trailer, other times with just the truck.
In both Washington and Colorado, I have driven toll roads (not manned booths but auto-capture facilities). After about a year of this and not receiving a bill in the mail, I actually phoned the two agencies that manage the tolls for each state. I thought it was my responsibility to pay whatever was owing (and as well, I did not want to risk being stopped for a traffic violation and getting arrested when the officer ran my name and discovered that I had a warrant for unpaid monies owed to the state!!).
I actually spoke to a rep in each state and was informed that neither agency had any access to the computer records to enable any Canadian plates to provide registered owner details, so they do not even keep those toll records. In further conversation, they stated they did not think any state was capable of billing Canadian plates (they believed but were not absolutely certain, so the eastern states could be different).
Keep in mind, this is only related to tolls and traffic issues like photo radar may be different (although I used to be a cop and don't believe we had a reciprocal agreement with Washington state to share r.o. records for traffic matters either).
Marv