Every state is different. Even city vs rural..Maryland inspection is a different story however.
Is that county to county? I live in Baltimore County, can I use that self service station?Not that I advocate bypassing the emissions, but in Anne Arundel County the self-service option is available for $10 and all you do is plug their computer into your OBD port. As for the in person inspection, I don't recall them even looking at the vehicle other than to plug in the computer.