Why shouldn't commercial trucks pay? The damage to the roads goes up exponentially with the weight each tire puts on that surface. Trucks do vastly more damage to road surfaces than passenger cars.

Weather also does a lot of damage, obviously. That can be mitigated to a substantial degree by building roads to a better standard. They do this in places like Japan and colder countries in Europe. They also do it in NH and the result is the road costs more up front, but long term maintenance costs (fixing potholes) are lower.

There's also NFW states won't chase those road dollars.