Maybe. Before I got an Ezpass, on the occasions I had to drive toll roads I'd get a bill in the mail a couple months later with 30 days to pay. No nasty notice of evasion, I paid the bills promptly so no idea what the next step would be if I didn't pay. N.Y. Thruway, Maine Turnpike and Spaulding Turnpike in N.H.
Must vary by state, I believe it's $30 they keep in reserve here in N.H. It's not a huge imposition. Probably cheaper for the state to administer than to have to process a zillion $1 transactions.
Got the Ezpass a couple years ago to make it easier when we do a road trip. It's valid throughout the northeast, and as far west as Illinois.
In N.H. we have 2 toll roads...the Everett Turnpike which runs between Nashua & Concord, and the Spaulding Turnpike from Portsmouth to Dover. There are still a couple of cash lanes at the Hooksett tolls, though they're only open limited hours. Not sure on the Spaulding.
I would imagine being a tollbooth attendant would be a sucky job, stuck in a cramped hot-in-summer-freezing-in-winter booth having to breathe exhaust fumes 8 hr/day.
I believe it is on the interstate system. Any toll roads that are part of that system were already in place, and those roads were incorporated into it.