However, while these so-called "electric roads" actually already exist, it could be a very long time before we see them deployed on a meaningful scale, if ever.

Before deciding if electric roads are worth installing, it's a good idea to look at the cost of building them.

Electric roads may make the most sense on busy freight corridors and around places like ports, where trucks drive along predictable routes.

For electric roads to spread, the technology will need to show that savings from smaller batteries and reduced downtime can outweigh the expense of installing and maintaining the roads.

The future of electric roads may therefore lie not in electrifying every highway, but in targeting the routes where they can deliver the greatest benefit.