The radar can detect cars even with poor visibility, and it uses easy-to-distinguish symbols for the driver to identify the proximity and closing speed of nearby racecars using different colors.

When it comes to technology used in racecars, we generally expect it to trickle down to production cars, not the other way around. Well, Pratt & Miller has developed a new rear-facing radar that operates in a similar fashion to what we're used to in modern blind spot detection systems, only it is also capable of tracking cars as they approach and relaying vital information to the driver via a large display screen.The innovative radar system debuted at last weekend's 12 Hours of Sebring for Corvette Racing , and this system makes perfect sense for endurance races like this since the cars sometimes have to drive through the night and in poor weather conditions."The system uses a rear-facing radar sensor to track up to 32 objects, and runs on a custom-built Linux PC with a Core i3 CPU," said Chris Hammond, Embedded Systems Engineer for Pratt & Miller. "With a momentary glance the driver knows how many cars are following, how far back each one is, their closing speeds, and whether or not they are probably a faster class."Displayed in the image above, the radar can detect cars even with poor visibility, and it uses easy-to-distinguish symbols for the driver to identify the proximity and closing speed of nearby racecars using different colors. The yellow marker shows a car that is driving at the same speed as this car, green is for a car that is falling away and red is for a car that is closing in quickly. The line through the marker indicates that the software thinks the approaching car is from a faster class, which would be the case when a Prototype car goes to pass a GT car in the American Le Mans Series . A large arrow that flashes to either side when the car is being overtaken, and there is also a line graph at the side of the screen to give an estimate of how many seconds back the cars are.Currently, Hammond says that Pratt & Miller is the only company to have a system like this used for racing, and it plans on selling the technology to other teams in the future – although a price has not been set.There are a couple videos posted below showing the system in action. The first one is a shot purely from the radar (so it has no audio) but shows a detailed look at how it all works. The second video is a point-of-view shot from Corvette Racing's Tommy Milner, and it shows how the driver uses the system in real time.