Yes... Tires. It did have the ground off level old asphalt road bed as support under it. But they did lay it thick per Ca engineer standards. Probably too thick because of the words “California Engineers”. :)
But seriously it was so soft that in the summer a big rig would leave tire divots if it sat on it more than an hour. When you tried to jack up an axle for a tire repair the jack would leave a 3 inch square hole in the road because it sank in two inches.
Interesting.
Jeff Chandler, are the roads you are familiar with where it works well constructed of solid concrete with a covering of this rubberized stuff?
I have seen concrete roads that seemed to last forever, but...diving long distances on them got to be maddening...”gadunk-gadunk...gadunk-gadunk...gadunk-gadunk...gadunk-gadunk...gadunk-gadunk...gadunk-gadunk...gadunk-gadunk...gadunk-gadunk...gadunk-gadunk...gadunk-gadunk...gadunk-gadunk...gadunk-gadunk...gadunk-gadunk...”
LOL, hour after hour! I would think that rubberized covering would be great for that.
That completely has the ring of truth to it (to my ear, at least)
It sounds as if there was too much tar in the mix. Just a guess.