Many of the research projects into automated highways concluded essentially the same thing and that average journey times could be significantly reduced, and pr

Many of the research projects into automated highways concluded essentially the same thing and that average journey times could be significantly reduced, and propagation delays effectively removed, by everyone travelling at near similar constant speed. The problem however is not everyone will do this e.g. some people simply love to speed, and changing behaviour in people is harder than changing the rules they should follow. Some of the projects successfully proved the concept in real world usage of the technology, but issues due to insurance (who will be liable in case of accidents) and infrastructure cost seem to be the main barriers at present.