They have their first public trial installation down now. It doesn't seem to be working out quite the way they thought...
So after giving them hundreds of thousands of taxpayer's money, it turns out the project cracks at the points where it was expected.
Great use of public funds there!
Sebastian Anthony noted in ExtremeTech that the cost to replace all roads in the United States with Solar Roadways panels would come to approximately $56 trillion, based on Scott Brusaw's cost estimate of $10,000 for a 12?12-foot section. The USDOT announcement of Phase IIB funding in December 2015 mentioned that because the solar cells were still manufactured by hand, they were "very costly to produce".
The first installation for Solar Roadways SR3 panels in Sandpoint, Idaho covered a walking only area of 150 square feet, at an estimated cost of $500,000. This is 50 times Brusaw's cost estimate for a similar sized area of roadway.
The circular runways make some sense. Solar Roadways is a case of too much sugar combined with a bad acid trip.
Circular runways stop making sense when you remember one element of reality is "crosswinds." Also when you remember how an airplane actually turns.
There are no crosswinds in a runway with literally any direction of take off possible. If the winds blow from 265, there would be ways to calculate according to your planes performance, to start the take off run from somewhere in the circle so you are at Vr at the point where your nose is pointing at roughly 265. Landing would be the same thing.Beat me to it. To add to that, runways are typically arranged in such a fashion that planes take off into a headwind to increase lift and decrease the distance one has to travel on the ground.
You couldn't have 2 or 3 airplanes taking off and landing at the same time if winds are over, say, 5 or 10 kts though, one of them would be landing with a tail wind and that's not ideal