Road safety continues to be a major concern for both researchers and car makers alike. Yesterday saw yet another real-world trial kicking off, this time on a much grander scale. A total of 3,000 vehicles in Ann Arbor, Michigan are taking part in a 12-month project run by the state's Transportation Research Institute. The vehicles have Dedicated Short Range Communications and video recording facilities, which means the cars can communicate with each other, traffic signals, and share data to a central platform -- which in turn issues warnings when high risk situations, or if traffic problems occur. Of course, this trial will also create a massive data set, which researchers will be able to plunder, and help the National Highway Traffic Safety Administration (NHTSA) better determine the viability of such systems. So while it's unlikely to lead to self driving cars just yet, it's a step in the right direction.