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Cadillac Celestiq flagship EV shows off its tint-shifting smart roof

GM has high hopes for its upcoming Cadillac Celestiq sedan, slated for release in 2023. The flagship EV is being built to help the brand recapture its reign as “the Standard of the World.” As such, itÂ’s expected to arrive packed to the gills with cutting edge, futuristic technology including an all-glass roof that can adjust its opacity anywhere between crystal clear and completely opaque with the mere flick of a switch. These roofs, dubbed SPD-Smartglass, have been designed and manufactured by Research Frontiers of Woodbury, New York, and are based on Suspended Particle Device technology that was originally created as a replacement for the manual sliding window shades aboard commercial aircraft, Research Frontiers CEO Joe Harary told Engadget. Some of the earliest examples of SPD window treatments can be seen on the 2011 Mercedes Benz SLK roadster and in the 2012 Mercedes S Class coupe, which were used to increase headspace while eliminating the physical window shade screens, as well as various McLaren models over the past decade. As the YouTube video below explains, Research Frontiers SPD tech relies on polyiodide nanoparticles to generate its tint effect. Magic Sky Control Using SPD-SmartGlass Technology “SPD technology is smart glass that allows you to change the tint of the glass,” Harary explained. “There's this film that we invented that has little nanoparticles in it, which you can control with a small electrical voltage. So, basically this film... that allows you to dial in whatever tint level you'd like.”  “The crystals are about three to five tenths of a micron in length and they act as induced dipoles so when you apply an electric field to conductive coatings in the film,” Harary continued, “ the particles will line up, and allow light to pass through. Then, when you remove the voltage, their natural tendency is to be in the dark state due to Brownian movement and that causes the glass to tint.”  As the tint partially blocks incoming photons, it also reduces the amount of glare experienced by the driver and the heat trapped within the vehicle — over 99.5 percent of light and 95 percent of heat, per a January press release from the company. The claim is, this allows vehicle occupants to stay comfortable for longer without having to turn on the A/C, as well as keep the interior up to 18 degrees Fahrenheit cooler overall, Harary said.

GM recalling 54k Cadillac SRX, HD pickup models

There are more recalls to report General Motors, but these latest actions pertain to newer examples of the Cadillac SRX, Chevrolet Silverado HD and GMC Sierra HD. With so much scrutiny on the company's recall strategy, GM is under increasing pressure to call in defective models more quickly, and it appears to be doing so here.
Here in the US, the automaker is recalling 50,571 Cadillac SRX crossovers from the 2013 model year fitted with the 3.6-liter V6 because the transmission control module programming can cause a three- or four-second lag in acceleration at low speeds. The explanation filed with the National Highway Traffic Safety Administration states, "if the following sequence occurs within two seconds: during an upshift from first to second gear (8-10 mph), the driver then brakes the vehicle to less than 5 mph, and then accelerates again," the delay can occur. According to Automotive News, the recall effects 56,400 vehicles worldwide, and the company is not aware of any crashes caused by the problem. The fix consists of a transmission control module (TCM) reflash.
In a separate recall, GM is repairing 51 Chevrolet Silverado HD and GMC Sierra HD pickups from the 2015 model year in the US. In vehicles with diesel engines and dual fuel tanks, the nuts that connect the fuel pipe to each side of the transfer pump between the tanks may be improperly torqued, which could cause a fuel leak. Obviously, this could be a fire hazard. The remedy is simply tightening the hardware. According to GM spokesperson Alan Adler, there have been no fires actually caused by the potential leak. "Only 21 of the trucks are in customer possession and they can be fixed anytime because there are no parts involved. The others are being fixed at dealerships," Adler said in an email to Autoblog.

Vintage photos: How presidential limos evolved from open convertibles to Biden's armored Cadillac

President Ronald Reagan waves from the back of his limousine in 1984.Ronald Reagan Library/Getty Images US presidents used to ride in unarmored convertibles with open roofs. After John F. Kennedy's assassination, presidential cars were customized with safety features. Today's presidential limousine is a 20,000-pound, $1.5 million Cadillac known as "The Beast." US presidents used to ride around in open convertibles. Today, President Joe Biden is driven in a 20,000-pound, $1.5 million armored Cadillac known as "The Beast." Take a look at how presidential limousines have changed through the years. Presidential cars replaced horses and carriages in the early 20th century. President William McKinley rides in an automobile in 1896.Photo12/Universal Images Group via Getty Images President William McKinley, who served from 1897 to 1901, was the first US president to ride in a car, according to the National Archives. The administration of President Theodore Roosevelt, who succeeded McKinley after his 1901 assassination, was the first to include a government-owned car. In 1941, President Franklin D. Roosevelt became the first president to ride in an armored vehicle — a limousine that previously belonged to gangster Al Capone. President Franklin D. Roosevelt rides in a car with bulletproof glass in 1942.Bettmann/Contributor/Getty Images Roosevelt previously drove around in a 1936 Packard Touring Limousine. Then, in 1941, he upgraded to an automobile with bulletproof glass that the Treasury Department had seized from Capone in 1932, according to the US Secret Service. President Dwight Eisenhower's presidential limousine was a 1955 Chrysler Crown Imperial. President Dwight Eisenhower waves to cheering crowds in 1955.Bettmann/Contributor/Getty Images The car featured a 250-horsepower V8 engine and a sunroof, according to the US Secret Service. President John F. Kennedy's assassination in the back of a 1961 Lincoln Continental changed presidential cars forever. President John F. Kennedy, and first lady Jacqueline Kennedy ride through Dallas in 1963. Minutes later, Kennedy was assassinated as his car passed through Dealey Plaza.Bettmann/Contributor/Getty Images Kennedy's limousine included a hydraulic seat that could be raised 10.5 inches for a better view of the president, but no protective features. After Kennedy's assassination, presidential cars were customized to prioritize the safety of the commander-in-chief with thick layers of armor.