Oh, nice idea ... until the roads get ripped up for traffic lights, telephone and sewage lines, water pipes, base settlement, gas lines, new turn lanes, bridges, ......
Oh, A flat plate ground-level receptor on a constantly rotating planet with a solar elevation angle of a moving star hidden by hundred of millions of constantly moving shadows under cars, trees, buildings, cloud cover, dust, pollen, and haze .....
Is “slightly less” than efficient.
Besides, NO solar panel can generate any more than 1/4 of the day (from 9:00 AM to 3:00 PM) ... So you need to generate 4 times the energy needed at peak power (noon) and then re-create it from ??? storage until the power is needed the remaining 3/4 of the 24 hour day.