Intelligent Highway system:
As quoted, Intelligent Highway system would allow computer-controlled automobiles to travel faster and closer together on freeways than today's human-controlled cars, there are a number of security of concerns which need to be overlooked before the implementation of such a system.
First of all the cars should be equipped with an appropriate number of airbags to ensure safety in case something goes wrong. There should be an algorithm to make sure that there are no vehicles within a range of at least 5 meters to ensure proper spacing between cars.
The speed limit should always be kept in check. A constant speed should be maintained throughout the highway. The cars travelling around should accelerate and decelerate at the same rate to avoid collisions.