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I never understood why anyone would even try solar roads. The properties needed don't match.
I like sound screens; they act as wind screens too. Large parts of the A12 have sound screens already and I can see consumption drop when I pass them.
New sound screens are being built on the north bank of the A12 between De Meern and Harmelen. They have solar panels, or rather they are solar panels...
No doubt the solar sound screens are not as cheap as regular sound screens, but the added cost may well be less than what's needed to build the same capacity in regular PV paneling and this way it takes up no extra space at all.
A far better way to combine solar and roads imho.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
  lifetime FE over 0.2 Gmeter or 0.13 Mmile.
For confirmation go to people just like you.
For education go to people unlike yourself.
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