The fuel economy of the actual vehicles on US roads has only improved by less than a mile per gallon over the last 25 years—partly because it takes many years to turn over the fleet.
Self-driving vehicles should make roads safer and save energy, but they also might make some people sick.
The fuel economy of the actual vehicles on US roads has only improved by less than a mile per gallon over the last 25 years—partly because it takes many years to turn over the fleet.
Self-driving vehicles should make roads safer and save energy, but they also might make some people sick.