Mapping data will be important, but not to prevent accidents. Maps will not be 100% accurate, so even with perfect maps, cars will end up on roads they think aren't highways while in fact, they are. There also will be newly one-way streets that aren't in the mapping database yet, roads closed due to construction or accidents, etc. Yes, both will be rare, but multiplied by millions of cars (necessary to get the 'worth trillions' part)? Not so.
So, let's say you are driving a vehicle that isn't allowed on the highway but incorrectly takes one. How do you think maps will help with the "and then getting into an accident" part?
So, let's say you are driving a vehicle that isn't allowed on the highway but incorrectly takes one. How do you think maps will help with the "and then getting into an accident" part?