Just about 10 miles from Concord (the capital city of my state), is a rest area on Interstate 93 northbound in Canterbury, New Hampshire. These telephone booths are common on state property (remember Cannon Mountain?) What may have been Verizon managed, is now managed by a CLEC. Both booths do provide dial tones as you can see in my selfie in the next image.
Phone Booths
Pay to Call: NYC Visit: Telephone Booths
I did not test these on Saturday as the stereotypical SOP of visiting New York is to avoid touching things unless necessary.
I wasted nearly 60% of my battery juice on my iPhone taking pictures and loading them to Instagram (like a stupid teenager) and I stupidly forgot my Lightning charger cable to charge the phone with my emergency battery. I had to go to the 5th Ave Best Buy as the Fifth Ave Apple Store had the worst service, 12 or more people walked by me and didn’t offer me help (i.e. helping me buy the Lightning cable as Apple long ditched the checkout lines.)
So yeah, if there was ever an emergency, I would think it’s important to have a payphone functioning at least for every dozen blocks, I would suppose.