No inspections like that in MD We have 2 year inspections but all the do is plug in, scan for codes, send you out the door. Literally takes about 5 minutes and you're done. Now when I lived in NY we had inspections same as PA has so I get what you're talking about and honestly I think it's a good thing. The way MD does it is not good, allows for unsafe vehicles to be on the road and people may have no idea the issue is even there.
Va does an annual inspection. But MDs I dont get. We do the emissions test, and that isnt even state wide. Apparently the eastern shore people dont do it like us "western shore" people do. I have looked a few older T4rs that should not have been on the road. 2 were obviously rolled in an accident. A few were in such a bad accident you could see the large waves in the roof line. Those should never have been back on the road.