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Watch Stanford's self-driving Audi hit the track

Sending a self-driving race car around a track with nobody inside seems pointless – there's no driver to enjoy the ride, and the car certainly isn't getting a thrill out of it. But the students performing research with Stanford University's Audi TTS test rig "Shelley" (not to be confused with Audi's own self-driving race cars) are getting a kick out of the numbers generated by the machine. "A race car driver can use all of a car's functionality to drive fast," says Stanford Professor Chris Gerdes. "We want to access that same functionality to make driving safer." The teams push the car to speeds over 120mph and the computers have executed lap times nearly as fast as professional drivers. However, they also spend a lot of time maneuvering at 50 to 75 mph, the speeds where accidents are most likely to happen. That way, the students can figure out how to incorporate braking, throttle and maneuvering to develop new types of automatic collision avoidance algorithms. Better technology, for instance, could have saved Google from a recent slow-speed accident where its vehicle was struck by a bus. During race days, students break into teams to perform different types of research. "Once you get to the track, things can go differently than you expect. So it's an excellent lesson of advanced planning," says Gerdes. In the latest rounds of testing, for instance, one PhD student developed emergency lane-change algorithms, while another recorded a skilled human driver in an attempt to convert his behavior into a driving algorithm. The main goal, of course, is to prepare students for something they may not have expected -- an automotive industry that is adopting self-driving technology at breakneck speeds. This article by Steve Dent originally ran on Engadget, the definitive guide to this connected life. Green Audi Technology Coupe Autonomous Vehicles Racing Vehicles Performance Videos racecar research

Audi reveals new beefed-up A8 L Security

Audi claims is the lightest armored vehicle of its kind.
If there were ever a sedan that deserved the descriptor of "luxury," surely it's the Audi A8. Particularly in long-wheelbase form. But for many of Audi's wealthy customers around the world - namely those in developing markets - there can be no greater luxury than security. And for just those customers, Audi has announced the new A8 L Security.

Don't buy that crossover! Buy a cladded wagon instead!

If you're looking to buy a car soon, and you're like most Americans, there's a strong chance you're considering buying a crossover SUV. That's what people want nowadays. People like the tough, tall exterior that suggests adventure and preparedness, they like the high seating position, they like the all wheel drive many have and they like the practicality. Because of this, crossovers have rapidly supplanted typical cars such as sedans, wagons, and more as the most popular vehicles in the country. But they're compromised, too. They're often heavy, thirsty, and expensive compared with more conventional cars. The good news is, there's an alternative, a happy medium between the straight crossover and the traditional car. They're lifted wagons, and they're the best crossover SUVs around. And for those who may not know what we're talking about, we're talking about cars and wagons that have been given a suspension lift for more ground clearance and a higher ride height, and often have all wheel drive standard or optional. They also usually have chunky plastic body cladding to make them look tough and durable. Examples include the Subaru Crosstrek, Audi A4 Allroad, Buick Regal TourX, and Volkswagen Golf Alltrack, among others. Because of the suspension and body modifications, these vehicles fit the trendy crossover mold quite well. And in the case of long-running nameplates such as the Subaru Outback and Volvo Cross Country models, they even have some heritage as outdoorsy machines. They also provide the higher driving position that crossover buyers love. And in some cases, such as with the Golf Alltrack, we've learned they offer better ride quality than their road-oriented siblings. View 9 Photos So these tall wagons offer the key things crossover buyers want, but what makes them better than traditional crossovers is that they have the advantages of the cars they're based on. For instance, the aforementioned Golf Alltrack still drives mostly like a Golf, which is to say, it's nimble, feels peppy, and is easy to maneuver because of its relatively small size. We can't really say the same for the Tiguan, which feels generally more sluggish and uninteresting than the Alltrack. And we mention Volkswagen's compact crossover because it starts at nearly the same price as the Alltrack. Some of the difference in giddy-up can be explained by weight. Normal crossovers can be fairly portly, while these lifted wagons are notably lighter.