Imaging radars are way more expensive than cameras, but the type useful in the most basic collision avoidance costs just few dollars. There is no reason to not

Imaging radars are way more expensive than cameras, but the type useful in the most basic collision avoidance costs just few dollars. There is no reason to not to have them in a car priced $100k, even just as a failsafe backup to the videocamera. In the future though, mass produced single chip radars have all the chances to beat every other sensing method on cost.