Not a lawyer, but I know many states do restrict what vehicles from out of state, commercial or not, do in their state.
Some states let you tow a boat behind your 5th wheel RV. Some even allow boat behind a pull behind. Other states, you got to make 2 trips.
Courts have declared state laws that regulate trucks are not the same as regulating commerce.
Reisender wrote: It would be nice if they would extend the regs to all the tuner pickup diesels out there. Stinky beasts. And loud. Ugh.
My thoughts exactly. If your vehicle has emission controls legal at the time of manufacture it should pass. If not you should be required to repair.
Should do roadside checks If wear or use is causing the issue, you have a limited time to use it and get it repaired. But if the test determines it has been modified, driver leaves in cuffs. Family is sent walking. Vehicle leaves as load. It is sold at auction to somebody that can repair.
Reisender wrote: It would be nice if they would extend the regs to all the tuner pickup diesels out there. Stinky beasts. And loud. Ugh.
My thoughts exactly. If your vehicle has emission controls legal at the time of manufacture it should pass. If not you should be required to repair.
Should do roadside checks If wear or use is causing the issue, you have a limited time to use it and get it repaired. But if the test determines it has been modified, driver leaves in cuffs. Family is sent walking. Vehicle leaves as load. It is sold at auction to somebody that can repair.