what is the latest and greatest about older trucks in the big CA?? (example) can you still drive a 2005 tractor in and out of the state, or does it have to be modified??
You can either get a 3 day pass, a 1,000 mile allowance, prove financial hardship (and own 3 or fewer trucks), modify by installing a particulate filter, or be one of the 3 aforementioned trucks, with one already being modified or replaced. Hope that helps. I know, clear as mud.