![General-Featured-Image-678](https://library.solari.com/wp-content/uploads/2020/12/General-Featured-Image-678.jpg)
By Clive Cookson
I start to walk across a street in a city of the near future. An autonomous electric car is gliding silently towards me, driving itself to pick up a group of passengers. The vehicle slows down – but how do I know it will let me cross the road safely?