Solar roads have plenty of potential problems, such as damage and snow, but theft? Apparently that's a concern, too. China's Qilu Evening News reported [google.com] that thieves carved out a small (5.9in by 73in) portion of an experimental road in Jinan on January 2nd, a mere five days after its December 28th debut. While it's tempting to suggest this was an accident, officials said the missing segment was "neatly cut," and didn't appear to have come loose on its own.
The segment has since been repaired. An investigation is ongoing, but there aren't any identified culprits as of this writing.
Source: https://www.engadget.com/2018/01/07/thieves-take-portion-of-china-solar-road/ [engadget.com]