Don't forget that the M5 was just dual lane around Worcester in the 90s. Nightmare in the summer.
I can remember going to Cornwall in the 90s , got to a hill and all I could see was the sun shining on 100s of car windscreens stationary in both directions so I got the map out , found a road that almost ran parallel with the A30 ,result , that's when I found out B roads in cornwall were dug out of red mud in the middle ages , it got that narrow at one point I had to get out and pull the mirrors in on the van , luckily no angry farmers came the other way
Thankfully my van wasn't as wide as this , 5 hours he was stuck there, wedged in, couldn't even get out of it