Wouldn&#x27;t it be much easier to assure security on roads if every car had to have 50 USD short-range (500 m is enough) radio transmitter that sends its velocity and position (from GPS).<p>It&#x27;s obviously possible techincaly (see cheap tablets), and from law POV (see seat belts requirement).<p>It would be useful (the device can have cheap black and white lcd screen and show &quot;radar&quot;-like view with cars ahead and behind).<p>It would also increase security even if there are no automated cars (overtaking tall cars will be much easier for one thing). Of course - if some cars don&#x27;t use it - it&#x27;s actaully decreasing security, so there needs to be adjustment period.<p>And when these things are in place - automated cars are much easier problem.