Having worked on the Ultra PRT project (http://www.ultraglobalprt.com), which was born out of Bristol University thanks to the late Professor Martin Lowson, it's great to see Bristol involved in this driverless car project.

However, it's a real shame that the Bristol project is basically another study, led by consultants, which won't actual result in any implementation. The Ultra system at Heathrow has now carried over a million passengers, operating in one of the world's busiest environments, and yet none of the engineering or operational experience will factor into the study (or even be used to - shock horror - actually test something rather than just study it).