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The skinny on Delphi's autonomous road trip across the United States [w/videos]

Rolling out of an S-shaped curve along Interstate 95, just past Philadelphia International Airport, the final obstacle between the autonomous car and its place in history appeared on the horizon. So far, the ordinary-looking SUV had traversed the United States without incident. It had gone through tunnels and under overpasses. It circled roundabouts and stopped for traffic lights. Now, on the last day of a scheduled nine-day journey, it was poised to become the first autonomous car ever to complete a coast-to-coast road trip. First, it needed to contend with the Girard Point Bridge. Riding in a rear seat, "I saw that bridge coming, and I thought, 'Oh my gosh, this is going to be a grab-the-wheel moment," said Kathy Winter, vice president of software at Delphi Automotive. The car, an unassuming Audi SQ5 nicknamed Roadrunner, had been well-tested. Back in January, a few inebriated pedestrians fell flat in front of the car during a demonstration in Las Vegas. It was the quintessential worst-case scenario, and the car admirably hit the brakes. More than drunken louts, bridges present a sophisticated challenge for the six radar sensors that feed data to the car's internal processors. Instead of sensing solid objects, radar sensors can read the alternating bursts of steel beams and empty space as conflicting information. "They're a radar engineer's worst nightmare," said Jeff Owens, Delphi's chief technology officer. Girard Point Bridge, a blue skeleton of girded steel that spans the Schuylkill River, might be a bigger challenge than most. Traveling across the lower level of its double decks, the autonomous car's radar sensors had to discern between two full sets of trusses. Cross the Schuylkill, and Delphi's engineers felt confident they'd reach their destination: the New York Auto Show. For now, the sternest test of the trip lay directly in front of them. A Data-Mining Adventure Until that point, the toughest part of the journey had been finding an open gas station in El Paso, TX. Trust in the technology had already been established. The main reason Delphi set out on the cross-country venture with a team of six certified drivers and two support vehicles was to capture reams of data. What better way to do that than dusting off the classic American road trip and dragging it into the 21st century? They did exactly that, capturing three terabytes worth of data across 3,400 miles and 15 states.

Audi reveals Prologue Allroad concept ahead of Shanghai

Audi kicked off the Prologue series of design studies with the coupe concept unveiled in LA, then followed up with the Prologue Avant wagon at the Geneva show. Now, we're seeing the third iteration in the form of the Prologue Allroad concept. Set to be unveiled next week at the 2015 Shanghai Motor Show, the Prologue Allroad picks up where the previous two left off, but takes it in a more rugged direction. At 16.8 feet, it's longer than both of the previous concepts, and stretches out to the same length as a standard-wheelbase A8. It also rides three inches higher than the Prologue Avant concept. Not only is it larger than the preceding showcars, it's also more powerful. Under the hood sits a hybrid powertrain that pairs a 4.0-liter twin-turbo V8 to an electric motor integrated into eight-speed automatic transmission. Together they produce a whopping 738 horsepower and 664 pound-feet of torque, driven to all four wheels to send the concept to 62 miles per hour in a scant 3.5 seconds – all the while returning a claimed equivalent of 98 miles per gallon. If that's not the best of both worlds, we don't know what is. Plus, the car packs an inductive charging system that Audi says it's developing for production. Massive 20-inch brake discs keep that performance in check, sitting inside 22-inch wheels, all mounted to an adaptive air suspension and four-wheel adaptive steering. Other exterior features include door lock sensors integrated into the window frame, Matrix laser headlights and LED taillights. Inside it's all angular yet elegant, swathed in dark blue, beige and brown. Display screens abound, stretching across the dashboard with a deployable OLED infotainment display in the center console. There's another OLED screen for the passengers in the pair of rear seats, who can also dock OLED tablets in the front seatbacks. A pop-up "sound spoiler" promises to envelop the cabin in music, and there's inductive charging for mobile devices as well. Together with its conceptual stablemates, the Prologue Allroad concept points towards a stylish and technologically advanced future for Ingolstadt, and we're looking forward to seeing this show car transition into production as the next A6 Allroad. In the meantime, you can scope out all the details in the press release below and view the concept from every angle, inside and out, in the slideshow above.

For Audi, Quattro name means something for hydrogen cars, too

Forget Dueling Banjos. Audi is proposing "Dueling Motors" for its Audi A7 Sportback H-Tron Quattro concept vehicle. All in the name of appropriate pickup, of course. The German automaker, which showed off the concept sedan at the Los Angeles Auto Show last month, is pairing a plug-in electric motor with a hydrogen fuel cell powertrain. Each motor powers two wheels, maintaining the Quattro's all-wheel-drive pedigree. The car's 8.8-kWh lithium-ion battery can drive the car as far as 31 miles on battery-power alone. After that, the water-vapor-spewing fuel-cell engine kicks in. Audi executive Ulrich Hackenberg told Automotive News Europe that the unusual set-up is necessary because the hydrogen fuel cell powertrain alone would only power two wheels while providing an insufficient 136 horsepower. Not exactly sport-sedan material, especially for a car that weighs about 4,300 pounds, even if it is a zero-emission ride. Combined, the two engines give the sedan 231 horsepower as well as a combined single-charge/full-tank range of almost 350 miles. What it all means is that the A7 can go from 0 to 60 miles per hour in less than eight seconds and has a top speed of about 112 miles per hour, and can still dash through the snow.