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Teaching autonomous vehicles to drive like (some) humans

While I love driving, I can't wait for fully autonomous vehicles. I have no doubt they'll reduce car accidents, 94 percent of which are caused by human error, leading to more than 37,000 road deaths in the U.S. last year. And if it means I can fly home at night in winter and get safely shuttled to my house an hour-plus away — and not have to endure a typical white-knuckle drive in the dark with torrential rain and blinding spray from 18-wheelers on Interstate 84 — sign me up. Autonomous technology will also take some of the stress, tedium and fatigue out of long highway drives, as I recently discovered while testing Cadillac Super Cruise. AVs are also supposed to eventually help increase traffic flow and reduce gridlock. But according to a recent Automotive News article, as the first wave of AVs are being tested on public roads, they're having the opposite effect. Part of the problem is they drive too cautiously and are programmed to strictly follow the written rules of the road rather than going with the flow of traffic. "Humans violate the rules in a safe and principled way, and the reality is that autonomous vehicles in the future may have to do the same thing if they don't want to be the source of bottlenecks," Karl Iagnemma, CEO of self-driving technology developer NuTonomy, told Automotive News. "You put a car on the road which may be driving by the letter of the law, but compared to the surrounding road users, it's acting very conservatively." I get it that, like teen drivers, AVs need a ramp up period to learn the unwritten rules of the road and that a skeptical public has to be convinced of the technology's safety. But this is where I become less of a champion on AVs, since where I live in the Pacific Northwest we already have more than our share of overly cautious human drivers. Since moving here 12 years ago, I've found it's an interesting paradox that a region famous for its strong coffee, where you'd think most drivers would be jacked up on caffeine, is also the home to annoyingly measured motorists. As an auto-journo colleague living in Seattle so aptly put it: "People in the Pacific Northwest drive as if they have nowhere to go." If you drive like me and always have somewhere to go — and usually are in a hurry to get there — it's absolutely maddening.

2022 Cadillac CT4-V Blackwing First Drive Review | A magnificent sunset

Rising from the ashes of the ATS-V, the 2022 Cadillac CT4-V Blackwing represents the ultimate (in the purest sense of the word) in compact performance from GM’s luxury brand. The name Blackwing was originally applied to a stillborn, twin-turbocharged V8 destined for a new generation of luxury sedans, but has been repurposed as a symbol for CadillacÂ’s stubborn insistence on doing right by its performance heritage, right up to the end. Yes, the end. The last gasp. The grand finale. Swan song. Farewell tour. Whatever version of finality works best for you, apply it here, because Blackwing represents the gasoline-powered CadillacÂ’s final form. There are two key components to a sport sedan: a kick-ass powertrain and a chassis than can wrangle it. Check and check. A modern and powerful twin-turbo V6 resides under the CT4-V Blackwing's hood, and it rides on the latest and greatest revision of GMÂ’s global Alpha platform, which evolved from the same basic underpinnings of the ATS, CTS and Chevy Camaro. A stretched and widened version is the foundation for the CT5 (look for our review of that car's Blackwing next week). In transitioning from ATS to CT4, Cadillac decided to reposition and price its smallest sedan against EuropeÂ’s subcompacts. In the grand tradition of CadillacÂ’s sporty four-doors, this makes it a size mismatch. ItÂ’s almost as large on the outside as a BMW 3 Series or Mercedes C-Class, rather than the front-wheel-drive based 2 Series Gran Coupe and CLA-Class with which the CT4 nominally competes on price. This generational re-branding also resulted in a new, very different approach to high-performance models wearing the letter V. Before, they represented the pinnacle of their respective nameplates, but now, a -V represents the mid-grade offering. Upgraded certainly (limited-slip rear differential, more power, adaptive suspension) but positioned against AudiÂ’s S and BMWÂ’s M-Sport models. Cadillac even calls it "CT4 V Series" in certain places because the situation wasn't confusing enough. And although there's nothing ambiguous about the Blackwing's position atop the CT4 hierarchy, Cadillac's have-their-cake-and-eat-it-too approach to the CT4Â’s positioning still makes things a little hinky.

Why an independent rear suspension for GM's new, full-sized SUVs wasn't easy

A Motor Trend report last month laid out how Cadillac's 4.2-lier twin-turbo Blackwing V8 could be an orphan due to cost concerns in the GM empire. Last-minute chassis changes to Cadillac's new sedans and XT6 crossover led to engine bays that couldn't fit the Blackwing. On the SUV side, according to the report, the new independent rear suspension for big people haulers cost so much to implement that GM ruled out reworking the Escalade to accept the Blackwing. At least one commenter rightly asked how could a suspension swallow that much money. A new piece in Motor Trend has the answer. The excellent Alissa Priddle spoke to Tim Herrick, GM's executive chief engineer for full-size trucks, about why the clean-sheet IRS cost "multimillions of dollars."  First, GM would need to build a new body shop at the Arlington, Texas plant that assembles the automaker's big SUVs to stamp the numerous wholly new parts and panels accommodating an IRS. Then GM would need to design and pay for a new assembly process. On top of those up-front costs, there was the incremental cost of the four-link IRS components being more expensive than those in the trucks' former leaf-sprung solid axles. Herrick endured so many rejections for so long that he remembers the date and time when he got approval for the new unit. He said it came down to a meeting where he told a higher-up, "I'll make you a deal: If we get to the reveal, or if we launch this and you think this was a dumb idea, I'll hand you my badge and let you walk me out." Head to Motor Trend to read the full story. Based on Herrick being on stage to help present the new SUVs to the press, and on our First Ride in the new Chevrolet Tahoe and Suburban at GM's Milford Proving Grounds, it appears this will have a happy ending for all involved. Furthermore, since Herrick worked on the T1 platform that supports the big SUVs as well as the light- and heavy-duty pickups, he understood the demands on the commercial side, too. That could be why when Roadshow asked Tim Asoklis, chief engineer of the Tahoe and Suburban, if the new IRS could endure life in the Chevrolet Silverado and GMC Sierra, Asoklis answered, "Oh, absolutely." Related Video: