Excellent news. So is this too much of a dream or is this a long term possible future? All roads are replaced with solar panels that can be driven on that are connected to charging/fuel stations that uses the solar power to produce Hydrogen and charge battery's. Cars pull in and either fill with Hydrogen or if a BEV charge the battery. To me the advantages of this is
1 - All our potholed badly maintained roads get replaced with something hopefully a lot stronger than the tar currently used. A lot more expensive initially but hopefully a lot less maintenance
2 - No need for tankers at all to transport fuel as the petrol stations actually become fuel generation stations, so no more tanker to have an accident on the highway and closes it for a day or two while the mess of cleaned up.
3 - the area of land used by roads is basically wasted land anyway so might as well use it usefully allowing the green areas to stay nice and green rather than being covered in solar or wind farms.
Also if the planners want they could put LED arrows in the solar panels and change roads usage, for example a 6 lane highway is 4 lanes one way in the morning and 2 the other and reversed in the afternoon. Even if Hydrogen tankers are still needed for some high useage fuelling stations at least the mess is quicker to clean up that petrol if there is an accident as it just evaporates into the atmosphere
Then if Hydrogen is available at many fuelling stations how hard would it be to convert classic cars to run on Hydrogen. Then car nuts could own an efficient daily driver car that use a fuel cell and an electric motor but if they want also own a classic an occasionally use it running on Hydrogen with less nasty gases than petrol coming out the exhaust.
On an other alternative fuel what happened to E85? My sons car runs on it and I know he can get it reasonably easy but only from two petrol stations in our town. The power his car produces is pretty stupid so it works pretty well and the exhaust smells different but not an annoying smell, a fair bit of water vapour comes out when the car is cold. I thought it was going to be the next future fuel that is renewable and green but it hasn't really taken off apart from racing cars and modified cars like my sons.
