It was first done in Ca and sold as Environmentally friendly. I was there when they did. Had to be all replaced within two years because the weight of trucks in those two summers squished it out. Ended up with two deep ruts like a dirt road in each lane. Maybe they improved the formula since, but as a subcontractor I made good money on both those pave jobs. So I witnessed the reality of it. They have not tried to use rubberized asphalt through there since.
We’ve had rubberized asphalt overlaying the concrete on Arizona freeways for decades. Smooth and quiet, Baby!
I take back the part about it not being hyped as environmentally friendly. The rubber is made from recycled tires. I sure they must have pushed that angle.
Was the asphalt in Cali a top course over concrete, or was it just asphalt?