We're not exactly low on this.
Most first world nations don't have a lot of space. And in any case, saving any space rather than destroying and fracturing habitats is always beneficial.
Solar panels aren't vulnerable to wind, unless you're talking about particulates, which definitely applies to a solar panel that is on the ground.
Directional panels are very vulnerable to wind, and can be damaged by high winds.
Solar panels that sit flat on the roof will usually cause that part of the roof to rise a little bit above the rest of the roof. This can lead to these panels being blown off in high winds.
What does this have to do with it? Are you implying non-road solar panels are automatically done by amateurs?
Many private solar panels are in situations such as being placed on someone's roof. However, when there's an issue with the panel, people will either not realize it, or improperly try to fix it themselves, rather than hire a professional. The same phenomenon can be seen when comparing septic tanks to centralized treatment plants. When these utilities are decentralized, the level of professional maintenance is decreased, which causes issues in the functioning of the item. However the centralized treatment plants are much more able to employ dedicated professionals to deal with maintinence.
The same goes for solar roads. They will be centralized, government-controlled source of productions of solar energy. Therefore, these roads will likely be better maintenance than decentralized, private panels.
These solar panels cost loads more just to manufacture, the installation and infrastructure cost, not to mention maintenance, will be astronomical.
You had to subtract the costs of asphalt placement and removal and maintinence. You also have to subtract the costs of the solar panels that would otherwise be used to produce this power. Centralized production in cases like these will often be much more efficient than decentralized solar energy production.
It's an absolutely awful idea.
They said TVs were awful ideas. Look where we are now.