Re: How old?
When I got that first Schwinn varsity back in '68, one of the places I used to ride a lot was up to the pool- and I'd take the northeast leg of I465 in Indianapolis- they were still building it and there was sometimes nobody out there but me-
they just finished putting up a big concrete wall next to it a few years back- to try to keep the massive traffic volume noise down.
It was really something that an Interstate was then two lanes in each direction- and there weren't any wider stretches than that for a few years. that stretch of road is now about 4 lanes in each direction, and lots of urban Interstates are wider.
I could then pedal out of traffic in five or ten minutes in Indianapolis, and always in five minutes in Bloomington through the '70's. It's really really different now....