Arterial roads, such as those lined with big box stores and shopping plazas, are commonly 3 lanes in each direction at 40mph speed limits (which means cars are driven at 45mph+), plus turning lanes.
Your best case scenario is the crossing being ~56ft, but 70ft+ crossings are normal for busy intersections. Which are ones you would also want to walk across.
Even a two lane in each direction road will commonly have a turning lane or two, making the intersection a 5 to 6 lane wide crossing.
I spent time in a couple of midwestern cities this year and was shocked at how wide the streets were. It was mind-blowing to me, coming from a city in the northeastern US. The typical road was wider than the "highways" we have near me (not interstate, but they are numbered state routes).
It also threw me off when walking as I could see I'd have to go a couple of blocks but every road crossing took a few minutes. Invariably I'd have to wait at least one light cycle, perhaps 2 if I was crossing both angles. And those light cycles were long.
The worst part was that it was rare to see much vehicular traffic at all except during some key times. What a waste of space.
The insane part is that there are in many cases NO trees along the road. Lawns everywhere, concrete. Ok, maybe a few trees, think 1 tree every 20m, and barely any bushes. A chance to contain that madness and sound levels, but nah, gotta see the huge billboards clearly from kilometers away...
I had to walk down one of these roads in Denver, let me see if I can find it.
W Alameda Avenue. 7+ lane for a lot of its length. Super sad walk.
Arterial roads, such as those lined with big box stores and shopping plazas, are commonly 3 lanes in each direction at 40mph speed limits (which means cars are driven at 45mph+), plus turning lanes.
Your best case scenario is the crossing being ~56ft, but 70ft+ crossings are normal for busy intersections. Which are ones you would also want to walk across.
Even a two lane in each direction road will commonly have a turning lane or two, making the intersection a 5 to 6 lane wide crossing.