I've heard of ideas for making the roads smarter like that suggestion before.
One idea people dream of is roads full of driverless cars (urgh) communicating so that none of them even need to stop at cross roads & it's all beautifully timed & efficient. This sort of stuff makes roads completely inaccessible to anyone not using that tech. That's not going to work.
In the case of cyclists, taking the discussion back a step, it's really about segregating forms of transport. We're not there yet though, obviously.