The company that would mass produce these if they were to actually to through with it would be a multi million dollar company. Think about how many roads there are. The biggest company would buy it I. A heartbeat.
They do so buy cutting wages to maximize profits. The lowest bidder wins and the richest company can afford to bid the lowest.
All the circuitry would be automated by servo arms cut out certified and experienced engineers/electricians
Assembly would be done on a line, it might not be minimum, but the amount of jobs lost is still very substantial.
Asphalt producers, asphalt painting, asphalt repair, concrete construction, concrete producers, and so on the list doesn't end.