Don't know about the US, but most roads in Europe already have coded reflectors to aid identification of lane geometry. Roadside reflectors have become a standa

Don't know about the US, but most roads in Europe already have coded reflectors to aid identification of lane geometry. Roadside reflectors have become a standard feature even on small rural roads, they're just hollow plastic half-tubes with reflecting strips on them. Cheap to install, cheap to maintain. https://duckduckgo.com/?q=road+reflectors&t=ffab&ia=images&iax=images https://duckduckgo.com/?q=road+reflectors&t=ffab&ia=images&i...