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Watch how Corvette Racing's new collision-avoidance radar system works

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 radar can detect cars even with poor visibility, and uses easy-to-distinguish symbols for the driver to identify.

GM program sees dealers taking on way more loaner cars

Given the volume of vehicles we're talking about, this is a significant development for GM's bottom line. Bring your car into the dealership for service, and you may need a loaner car in exchange. And with so many recalls being carried out, that means a lot of loaners – especially at General Motors dealerships. That could be one of the reasons why GM is massively expanding its loaner fleet program. While many Chevrolet and Buick-GMC dealerships have an on-site rental car location operated by a third party like Enterprise (which may or may not provide a GM vehicle), others manage their own loaner fleets. But while the range of dealerships operating such fleets was once small, reports Automotive News, the number has been growing rapidly: from the locations responsible for only 20 percent of those brands' sales two years ago to about 90 percent today. The impetus for that growth comes down to a massive expansion of GM's Courtesy Transportation Program. The initiative encourages dealers to ramp up their loaner fleet to a maximum size determined by GM, with a mix determined by the dealer itself, so that a showroom in Texas can be bolstered with a fleet of pickup trucks and a dealer in California can employ more Volt and Camaro Convertible loaners. The dealership gets a $500 credit for each vehicle its puts in its fleet, and can use those vehicles as loaners for service customers, as multi-day test drivers or to rent out separately. The vehicles remain in the dealer's fleet for 90 days or 7,500 miles, then they can be sold as used, but with new-car incentives. The dealer gets a fleet of loaners, customers get to use the loaners, try out a new car overnight or buy a barely used car with attractive incentives, and GM gets to clock more sales. But therein lies the kicker: the automaker counts the dispatch of the loaner new vehicle to the dealership as a new-car sale, which could end up distorting its sales figures. Counting loaner vehicles as sold vehicles is something of an industry-standard practice, but given the volume of vehicles we're talking about, this is a significant development for GM's bottom line. One dealership - Paddock Chevrolet in Kenmore, NY, for example - had no loaner fleet two years ago, but now runs a fleet of 50 vehicles. Multiply that by the 4,000 or so dealers GM has across America and you're talking about the potential for hundreds of thousands of these sorts of sales.

Dodge Challenger SRT Hellcat vs. Chevrolet Camaro ZL1 in latest Head 2 Head

"Olympian" is one of the terms we use to signify the greatest height, the seat of the gods. Yet Mt. Olympus is the second-highest peak in the Balkans ranges, overshadowed by the crest at Musala in Bulgaria's Rila mountains. Both great heights, but one is a little higher. That's how we get the Olympian Chevy Camaro ZL1 pitched at the Musalic Dodge Challenger SRT Hellcat in Motor Trend's latest episode of Head 2 Head. The side-by-side spec sheet is filled with farcical numbers. For the ZL1, that's a 6.2-liter V8 with 580 horsepower, 556 pound-feet of torque, a 4,051-pound curb weight, 0-to-60 miles per hour in 3.9 seconds, a quarter-mile time of 12.2 seconds and a base price of just $57,800. Opposing that, the Hellcat wrings out its 6.2-liter V8 for 707 hp, 650 lb-ft of torque, weighs 4,449 pounds, does the quarter in 11.7 seconds and has a base price of just $60,990. Except in the case of the Hellcat, when Motor Trend put it on the dyno the machine spit out a reading of 672 hp and 606 lb-ft at the wheels. If there's a 10-percent driveline loss through those beefed-up internals and heavy-duty eight-speed transmission, that means the Hellcat is actually rated at about 750 horsepower and 700 lb-ft. But once they get put on a closed-off strip of coast road in Northern California, there are only a few strands of hair between their respective performances. That's not the case for they sensations provide; host Jonny Lieberman calls one of them, "One of the most incredible cars ever made," and says, "It changes everything." Watch the video above to see who got the verdict and how. Related Video: