Smithsonian.com

The Solar Impulse flying over San Francisco at night. Photo courtesy of Jean Revillard/Solar Impulse

Bet you didn’t know that Texas has more solar energy workers than ranchers and California has more of them than actors, and that more people now work in the solar industry in the U.S. than in coal mines.

Or that in March, for the first time ever, 100 percent of the energy added to the U.S. power grid was solar.

Okay, so now you know all that, but I’m guessing you’re no more aquiver over solar energy than you were five minutes ago. That’s the way it is in America these days. Most people think solar is a good thing, but how jazzed can you get about putting panels on a roof.

Bertrand Piccard understands this. Which is why later this week, weather permitting, he will take off from Moffett Field near San Francisco and begin a flight across the U.S. in a plane entirely dependent on the sun. Called Solar Impulse, it will move at a snail’s pace compared to commercial jets–top speed will be under 50 miles per hour–and will stop in several cities before it ends its journey in New York in late June or early July.

But the point isn’t to to mimic a plane in a hurry, crossing the country on thousands of gallons of jet fuel. The point is to show what’s possible without it.

Batteries included

To do this, Piccard and his partner, André Borschberg, have created one of the strangest flying machines ever–a plane with the wingspan of a jumbo jet, but one that weighs about a ton less than an SUV. Its power is generated by nearly 12,000 silicon solar cells over the main wing and the horizontal stabilizer that charge lithium-polymer battery packs contained in the four gondolas under the wing. The batteries in total weigh almost 900 pounds–that’s about one quarter of the plane’s weight–and they’re capable of storing enough energy to allow the plane to fly at night.

Piloting the Solar Impulse is neither comfortable nor without a good deal of risk. Only one pilot can be in the cockpit–a second adds too much weight–and the engines are vulnerable to wind, rain, fog and heavy clouds. But Piccard is, by blood, an inveterate risk-taker. In 1999, he co-piloted the first gas-powered balloon to travel non-stop around the world. In 1960, his father, Jacques, was one of the two men aboard the bathysphere lowered into the Marianas Trench, the deepest part of the world’s oceans. In 1931, his grandfather, Auguste, was the first balloonist to enter the Earth’s stratosphere.

It was near the end of his own record-setting balloon trip that Bertrand Piccard was inspired to find a way to fly without needing to rely on fuel. He almost ran out of propane while crossing the Atlantic. He and Borschberg spent years planning, designing and finding investors–that was no small challenge–but they persevered and, in 2010, the Solar Impulse made the first solar-powered night flight over Switzerland. Last year it completed the first solar intercontinental flight, from Europe to Africa.

The ultimate goal–after the flight across America–is to fly a solar plane non-stop around the world. That’s tentatively scheduled for 2015, but it will require a bigger plane than the Impulse. Since they estimate that it will take three days to fly over the Atlantic and five to cross the Pacific, Piccard and Borschberg have been making other alterations, too–the larger version will have an autopilot, more efficient electric motors and a body made of even lighter carbon fiber. It also will have a seat that reclines and yes, a toilet.

There certainly are easier ways to go around the world, but Piccard sees his mission as stretching our imaginations about the sun’s potential. “Very often, when we speak of protection of the environment, it’s boring,” he said during a recent interview with Popular Science. “It’s about less mobility, less comfort, less growth.”

Instead, he wants to show that clean energy can just as easily be about being a pioneer.

Here comes the sun

Here’s other recent developments related to solar power:

• It’s always good to save some for later: A team of researchers at Stanford University has devised a partially liquid battery that could lead to the development of inexpensive batteries which can store energy created by solar panels and wind turbines. One of the challenges of both sun and wind power is to be able to store energy efficiently so it’s available when the sun’s not shining and the wind’s not blowing.
• Forget the undercoating, we’ll throw in solar panels: BMW, which will begin selling its first electric cars later this year, says it will offer buyers the opportunity to get a solar-powered home charging system designed to be installed in their garages.
• Go ahead and fold. Avoid spindling and mutilation: A Milwaukee middle school teacher-turned-inventor has created a small, foldable solar array that can charge an iPhone in two hours. Joshua Zimmerman turned what had been a hobby into a company named Brown Dog Gadgets and he’s already raised more than $150,000 on Kickstarter to get his business off the ground.
• And you thought your shirt was cool: An Indian scientist has designed a shirt containing solar cells that power small fans to keep the wearer cool. The shirt would also be able to store enough juice to charge cell phones and tablets.
• Charge of the light brigade: Since you never know when you need a lantern, there’s now a solar powered bottle cap that lights up your water bottle. Its four bright, white LED lights can turn your beat up water bottle into a shiny beacon.

Video bonus: Take a peek at the Solar Impulse during its test flight over San Francisco last week.

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Are you ready for some travel? Photo courtesy of Flickr user Mastery of Maps

Most Americans have already kicked into Thanksgiving mode, looking ahead to Thursday when they’ll sit down with family and friends, pile an unfathomable amount of food on their plates and then sleep it off to the soothing sound of supersized men smacking helmets on TV.

But between now and then madness lies. There will be traffic jams and long security lines and countless other aggravations that will make you wish that this year you had stayed home and opened a can of tuna.

Don’t despair. Believe it or not, traveling is getting easier. Here are 10 innovations that can help you now or give you hope about the future.

1) You’re the one who likes his cranapple juice shaken, not stirred: British Airways is breaking ground in showing passengers how much it knows about them. As part of its “Know Me” program launched last summer, the airlines is using data it has accumulated about its customers to allow flight crews to give them particularly personal service.

For instance, say a person is flying business class for the first time. That would be flagged 0n the crew’s iPads and a flight attendant could offer a special welcome and make sure he or she knew how to use the seat. Or someone who usually flies business class might instead be in coach taking a vacation trip with his family. A crew member might offer a free drink and make a fuss in front of the whole gang. That’ll score some points.

The big question, though, is when does knowing so much a customer slide from solicitous to creepy?

2) People you meet at airports can be so shallow: When they started showing up at a dozen or so airports around the world this summer, greeter avatars were by no means a sure hit. There was some concern that arriving passengers would be creeped out by holograms that go into a 90-second rap on airport info–location of baggage claim, bathrooms, etc.–as soon as anyone comes within 30 feet of them.

But generally the response has been positive, with plenty of passengers reaching for their cell phones to snap shots of these virtual women for the folks back home. And why not? They’re happy to be on a first-name basis. (Hi, I’m Eva…or Paige or Emily or Heather or Carla.) And they no doubt they bring back memories of Princess Leia, only they’re taller, have much better hair and are way too cheery to bring up anything having to do with Death Stars.

3) Because the real adventure starts after you leave the airport: Last year the Australian start-up Rome2rio launched its search engine designed to provide you with all the travel details for any trip–not just airport-to-airport, but door-to-door. So it includes train schedules and prices, driving routes, even ferry times, if that’s part of the journey. And just last month, it came out with an iPhone app that digs up the same info for you.

4) But can it make the cheapest be the fastest?: Madrid-based Amadeus has been in the airfare search business for several years now, but next year it hopes to take a big leap forward in simplifying the process for travelers.

Using a technology it calls Featured Results, it will be able to do a high-speed search of all possible fares between two locations and, in a matter of seconds, provide the top option in three different categories–the cheapest, the fastest, and the most popular.

5) The next best thing to not having a layover: Another tech product that’s been around for a few years is the mobile app GateGuru. It gives travelers the lowdown on the mysterious world beyond the gate–where you can find the best food, the best airport bar, the fastest security lines, a place to get a massage, the ATMs.

Now it’s entered into a partnership with JCDecaux, a company that handles advertising at airports. Which means the GateGuru content will soon be showing up in digital displays in airports. The first will be at Baltimore-Washington Airport.

6) And then you shoot on down to LA: You have to admit that Elon Musk has earned some cred when it comes to transportation. He’s co-founder of Tesla Motors–its Model S was just chosen Motor Trends’ “Car of the Year”–and founder of SpaceX–which last month flew the first commercial resupply mission to the International Space Station.

So when he talks about a transit system that he says could move people from San Francisco to Los Angeles in a half hour, you can’t dismiss him as someone who’s been munching on a bowl of crazy. Musk’s idea is something he calls “Hyperloop,” which he described as a cross between the Concorde and a railgun. Based on the few details he’s provided, it would be some kind of tube vehicle that would be able to leave as soon as you arrive and then get you to SF or LA in half the time a plane would take.

7) While you’re in the neighborhood: Airbnb started out as an online service that hooked up people looking for a place to sleep in another city or country with people willing to have strangers stay over. And it’s grown quickly–it has listings of 250,000 properties in 30,000 different cities around the world.

Now it’s taken a leap toward becoming more of a full-blown travel service by launching guides to the lesser-known neighborhoods where Airbnb clients are more likely to be staying. So far neighborhood guides have been rolled out in New York, Paris, London, San Francisco, Washington D.C., Berlin, and Rio de Janeiro.

8) What did you expect in Vegas, a milk store?: Given the location, this seems long overdue, but now an operation called the Liquor Library is open for business in Las Vegas’ McCarran Airport. It’s just as it sounds, a place where travelers can pick up beer, wine or booze–and not in some duty-free shop, but in a real live liquor convenience store that calls itself a library.

9) Surprise! There’s a Cracker Barrel in your future: Yes, we’d all like to be able to predict the future, but sometimes we’d settle for being able to know what’s off the next exit. That’s where mobile apps, such as Road Ninja, can make your life easier. It not only lets you know what’s up ahead, but you can also call ahead or read a restaurant review, although there’s only so much you can say about Denny’s Grand Slam.

10) What, no free cocktails for the parents?: Early next year, Air Asia will start setting aside a kid-free zone on its flights. And now a California consulting firm, RKS Design, has gone even further by dreaming up how an all-family airline might work.

They’ve named it cAir and it would feature express check-in services, stroller rentals and play lounges to keep the kids amused. The seats would be arranged so parents would face their kids, bathrooms would be large enough for diaper changes, and sound curtains could be pulled around a noisy little tyke. A kid would even be able to pick out a toy to play with during the flight–which parents would have the opportunity to buy if they can’t wrench it from his hands.

For now, it’s only a concept–no one’s sure if you could actually make a business out of the idea.

Video bonus: The Hobbit opens soon and fittingly Air New Zealand has started airing safety videos featuring a few flight attendants who look like they took a detour from Middle Earth. Sit back and relax, my precious.

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Meet the Qube drone, specially designed for police departments. Photo courtesy of AeroVironment, Inc.

The International Association of Police Chiefs held its convention in San Diego earlier this month and one of the booths drawing a lot of attention belonged to a California company called AeroVironment, Inc.

It’s in the business of building drones.

One of its models–the Raven–weighs less than five pounds and is the most popular military spy drone in the world. More than 19,000 have been sold. Another of its robot planes–the Switchblade–is seen as the kamikaze drone of the future, one small enough to fit into a soldier’s backpack.

But AeroVironment is zeroing in on a new market–police and fire departments too small to afford their own helicopters, but big enough to have a need for overhead surveillance. So in San Diego, it was showing off yet another model, this one called the Qube.

The camera never blinks

AeroVironment likes to tout the Qube as just what a future-thinking police department needs–a flying machine that fits in the trunk of a cop car–it’s less than five pounds and just three feet long–can climb as high as 500 feet and stays airborne as long as 40 minutes.

Outfitted with high-resolution color and thermal cameras that transmit what they see to a screen on the ground, the Qube is being marketted as a moderately-priced surveillance tool ($50,000 and up) for keeping fleeing criminals in sight or being eyes in the sky for SWAT teams dealing with hostage situations or gunmen they can’t see.

A few police departments have already taken the plunge into what are officially known as Unmanned Aerial Vehicles (UAVs)–big cities like Miami, Houston, and Seattle, but also smaller towns, such as North Little Rock, Ark., Ogden, Utah and Gadsen, Ala. Most used Homeland Security grants to buy their drones and they all had to be specially authorized by the FAA to fly them.

So far, they haven’t flown them all that much because the Federal Aviation Administration (FAA) doesn’t yet allow drones to be used in populated areas and near airports, at an altitude above 400 feet, or even beyond the view of the operator. But that’s going to change, with the FAA estimating that by the end of the decade, at least 15,000 drones will be licensed to operate over the U.S.

I spy a pool party

So how is this going to work? What’s to keep all those unmanned aircraft from hitting planes or helicopters or crashing into buildings? And what’s going to prevent them from spying on private citizens or shooting video of pool parties?

The FAA is wrestling with all that now and, given the need to ensure both safe skies and individual privacy, the agency may have a hard time nailing down regulations by August, 2014, the deadline Congress set earlier this year with the goal of opening up public airspace to commercial drones in the fall of 2015.

The feds are already behind schedule in selecting six locations in the U.S. where they’ll test drones to see if they can do what their manufacturers say they can do and, more importantly, if they can be kept from flying out of control. Later this month, however, at Fort Sill, Oklahoma, the Department of Homeland Security will start grading different drones on how well they perform when lives are at stake, say with a hostage situation, or a spill of hazardous waste or a search and rescue mission.

For a technology still largely seen as a deadly, and controversial, weapon for going after suspected terrorists, it couldn’t hurt to be able show how a drone can help find a lost kid or save an Alzheimer’s patient wandering through the woods.

Not so private eyes

Still, the idea of police departments or government agencies having access to flying cameras makes a lot of people uneasy. This summer, when a rumor started on Twitter that the EPA was using drones to spy on American farmers, it shot through the blogosphere, was repeated on TV, and then in condemning press releases issued by several congressmen–even though it wasn’t true.

As Benjamin Wittes and John Villasenor pointed out in the Washington Post earlier this year, the FAA isn’t a privacy agency. It’s loaded with aviation lawyers. Yet it will be dealing with some very dicey issues, such as how do you define invasion of privacy from public airspace and who can get access to video shot by a drone.

To quote Wittes and Villasenor:

“The potential for abuses on the part of government actors, corporations and even individuals is real — and warrants serious consideration before some set of incidents poisons public attitudes against a field that promises great benefits.”

Judging from a pair of surveys on the subject, the public is already pretty wary. Of those recently surveyed by the Associated Press, about a third said they are “extremely concerned” or “very concerned” about how drones could affect their privacy.

Another national poll, taken this summer by the Monmouth University Polling Institute, found that while 80 percent of the people surveyed like the idea of drones helping with search and rescue missions and 67 percent support using them to track runaway criminals, about 64 percent said they are “very concerned” or “somewhat concerned” about losing their privacy.

And they definitely don’t like the notion of police departments using them to enforce routine laws. Two out of three people surveyed said they hate the idea of drones being used to issue speeding tickets.

When robots fly

Here’s more recent research on flying robots:

• No crash courses: NASA scientists are testing two different computer programs to see if they can help drones sense and then avoid potential mid-air collisions. In theory, an unmanned aircraft would be able to read data about other flying objects and change its speed and heading if it appeared to be on a collision course.
• What goes up doesn’t have to come down: Two recent innovations could dramatically increase the flight time of both giant drones and handheld ones. Lockheed Martin has found a way to recharge its huge Stalker drones wirelessly using lasers, allowing them to stay airborne for as long as 48 hours. And Los Angeles-based Somatis Technologies is working on a process to convert wind pressure and vibrations into energy and that could triple the battery life of hand-launched drones to almost three hours.
• Get your protest souvenir photos here: Russia is stepping up its drone program and will continue to use them to monitor street protests.
• The face is familiar: The Congressional Research Service released a report last month suggesting that law enforcement agencies could, in the near future, outfit drones with facial recognition or biometric software that could “recognize and track individuals based on attributes such as height, age, gender and skin color.”
• Talk to me when it makes honey: Harvard researchers have been working on a tiny–not much larger than a quarter–robotic bee for five years and now it can not only take off on its own power, but it can also pretty much fly where they want it to go.
• Two blinks to get rid of red eye: Chinese scientists have designed quadcopters that can be controlled by human thought and be told to take a photo by the blink of an eye.

Video bonus: This promo video by AeroVironment sure makes it feel like the Qube drone could have its own TV series.

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Baxter, a robot that can work with humans. Photo courtesy of Rethink Robotics

About a year ago I wrote about the first meeting of the 100 Year Starship Symposium (100YSS), a conference designed to keep scientists focused on what it will take for humans to be able to travel outside our solar system.

Luckily, they still have about a century to figure it out. NASA and DARPA, the research arm of the Defense Department, are behind the project, and the latter has kicked in $500,000 to start wrestling with the ridiculously difficult challenge of traveling trillions of miles in space by 2100.

Last week, at the second 100YSS meeting, there actually was a bit of progress to note. Along with a discussion of how many pair of underpants would be required to make such a trip and a rendition of the “Star Trek” theme song by Lt. Uhura herself, came a report that warp drive might actually be possible, that it would require far less energy than previously thought for a spaceship to travel several times faster than the speed of light.

Good news, but still a long, long way from making real something we used to see happen on TV every week. It reminded me, though, of the iterative, and often methodical process of science and how too often the focus on innovation is more about the potential of new ideas and technology and less about how they actually evolve in the real world.

So here are updates on five innovations I’ve written about in the past year. Some are already making their mark; others remain on a low boil.

1) When robots play nice: Robots work great by themselves, but mix them in with humans and it can get a little dicey. Most robots, while amazingly efficient and powerful, can also be dangerous to people nearby because, to put it simply, they don’t know we’re there.

That’s not the case, however, with a new model designed by Boston-based Rethink Robotics. It’s called Baxter and it’s been given the artificial intelligence to slow its motions when it detects a person approaching. And, to alert humans that it’s aware of their presence, its face turns red.

Next month Rethink will start selling Baxter, which can be trained by humans to do different tasks. The goal is to expand the robot market beyond big factories by providing a model that’s safe and relatively inexpensive–Baxter will cost $22,000, a steal by robot standards.

2) Replicator 2! Coming soon to an office near you!: Much has been written about 3-D printing as the future driver of manufacturing. But Bre Pettis, CEO of Brooklyn-based MakerBot Industries, has always believed in the more personal side of 3-D printers. He thinks they belong in people’s homes right next to their PCs.

Since 2009, the company has sold 13,000 of its MakerBot models. But buyers have largely been hobbyists who ordered their printers online. Now the company is taking things up a notch. Last week Pettis unveiled The Replicator 2, a sleek, stylized and more expensive model, one designed to fit right into the suitably applianced home. Also last week, MakerBot opened its first real store, in Manhattan no less.

Ah, but there’s also a bit of a dark side to giving people the power to print objects at home. Last month, a Wisconsin engineer showed readers of his blog the working gun he made.

3) Every picture tells a story. Or three: When it came on the market early this year, the Lytro camera had some people saying it would do for cameras what the iPhone did for cell phones. It made photos interactive, allowing you to change what’s in focus in an image after the fact. Chicago’s Museum of Science and Industry was impressed enough to include a Lytro in its 2012 Smart Home exhibit.

The Lytro still may transform photography, but not this year. Probably not next year, either. For now at least, most people seem perfectly content with the photos they can take on their smart phones, and they aren’t ready to pay $400 for a camera shaped like a stick of butter that allows them to do something with photos they’re not in the habit of doing.

This summer, Lytro founder Ren Ng stepped down as CEO, a move he said would allow him to focus on the company’s vision and not get bogged down in day-to-day operations. This likely has a lot to do with how quickly Lytro, which raised $50 million in private funding, has grown. It still isn’t able to fill online orders immediately–it won’t share sales figures–but Ng says it has reduced the wait time to about a month.

In case you haven’t seen how Lytro photography works, here’s a sampling.

4) Apple has spoken: A lot of attention has already been paid to the new features of the iPhone 5–its bigger screen, 4G speed, longer battery life. But it’s also worth noting something it doesn’t have–a Near-Field Communication (NFC) chip.

That’s what turns a smart phone into a mobile wallet, enabling it to make payments by waving it at checkout devices in stores. There was much speculation that if Apple gave NFC its blessing, it would push the technology mainstream in the U.S.

But Apple balked, in part because not many stores in the the U.S. have been willing to upgrade their checkout systems with NFC devices. Customers haven’t exactly been clamoring for them and besides, if Apple’s not buying in, why bother, say store owners. (Ah, the vicious circle.)

This is not good news for Isis, a partnership of mobile carriers, including Verizon and AT&T, and credit card companies, such as American Express and Capital One. The day after Apple introduced its new smart phone–minus a NFC chip–Isis announced that it was delaying the launch of its NFC mobile payments service.

5) But who’s going to blow the horn?: Since I first wrote about it in July, 2011, Google’s driverless car has received big boosts in Nevada, which last spring became the first state to issue license plates to autonomous vehicles, and California, where last month, in an extremely rare case of bipartisanship, Democrats and Republicans joined forces to overwhelmingly pass a self-driving car law. It directs the state’s Department of Motor Vehicles and the California Highway Patrol to develop safety and performance standards for robotic vehicles.

But Google’s just getting warmed up. It’s following up its success in lobbying officials there by pushing similar legislation in Florida, Arizona, Hawaii and Oklahoma. And this is a concept that’s trending: BMW and Audi are known to be working on their own versions and no less prestigious an organization as the Institute of Electrical and Electronics Engineers (IEEE) recently predicted that by 2040, 75 percent of the vehicles on the road won’t have human drivers.

Still, it’s not all open road ahead. Automakers have raised questions about their liability if they start selling driverless cars–although Google is quick to point out that its fleet of autonomous Priuses have so far logged 300,000 miles without one accident. And a consumer watchdog group in California fought the driverless car legislation, raising privacy concerns about how all the data gathered by the vehicles is used. Could you start receiving ads based on where your car drives?

Video bonus: This was probably inevitable. A candidate in Florida has come under fire for his support of driverless cars and now one of his opponent’s campaign ads features an old lady with a walker nearly run down at a stop sign by, you guessed it, a car without a driver. In case you miss the point, the large type next to her asks: “Will Driverless Cars REALLY Slow for Pedestrians?”

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Welcome to the Feel Good Future

The road more traveled. Photo courtesy of Flickr user K2D2vaca

Usually I walk to work, but earlier this week, after another apocalyptic forecast of torrential rains and head-twisting winds, I fell prey to weather dread and drove in.

In no time, I was reminded of why Washington D.C. has the worst drivers in the U.S.–Allstate verified it–and also why it’s among the Top 10 congested cities in the country. The latest estimate is that drivers here waste an average of 45 hours a year in traffic jams. I don’t know if anyone’s come up with a comparable analysis of how much time the stress of sitting in gridlock takes off your life, but I’m guessing I said goodbye to 15 minutes or so that morning.

The experience revived my interest in the science of traffic flow and how GPS, sensors, and algorithms have made it possible to imagine a day when the commuting madness will end.

Here are some of the ways we just may get there:

1) Follow the wisdom of E. coli: That’s the thinking of two Chinese engineers wrestling with the hideous traffic of Guangzhou, a city of 13 million in southern China. They are advocates of applying “swarm intelligence” to traffic lights in the city, or more specifically, something known as Bacterial Foraging Optimization. This is an algorithm based on the behavior of E. coli, which, while very basic, ultimately results in the optimal solution to problems. In this case, the algorithm would be applied to stop lights, adapting them to traffic flow instead of keeping them on a fixed loop.

2) Failing that, you can still learn a few things from humans: Scientists at the University of Southampton in the U.K. found that real humans are better traffic controllers than computerized systems. So now they’re focusing on developing artificial intelligence for traffic control systems so they can learn from experience as humans do.

3) Or feel the pulse of social chatter: IBM studied traffic jams in three Indian cities over the past year through the social network comments of people stuck in them. The company’s evaluation of tweets, Facebook updates and other social network discussions of people in Mumbai, Bangalore and New Delhi is designed to show how social data can be used to read public attitudes on big urban issues, such as traffic. Among its findings: Drivers in New Delhi talked more about public transportation, weather and the stress of commuting, while those in Bangalore vented about the overall driving experience, construction and parking. And in Mumbai, they tended to rant about accidents and pollution.

4) Twitter intelligence is not an oxymoron: And Twitter is also being used in real time to stay on top of traffic accidents and backups on British highways. A mobile app called Twitraffic analyzes what people are saying on Twitter about traffic and warns you about problems that have popped up. The company behind the app claims it lets people know about accidents an average of seven minutes before the government’s Highways Agency does. It hopes to launch a U.S. version next month.

5) Meanwhile, back in the U.S.: There’s already a pretty impressive mobile app available here for helping you avoid commuting nightmares. It’s called Waze and it not only gives you directions, but it also monitors what other drivers are saying about what’s happening on the streets around you. It’s a traffic report through crowdsourcing, and one that constantly updates with new directions if there’s bad news coming in about the road ahead.

6) Just let the cars work it out: Since last month, about 3,000 vehicles around Ann Arbor, Michigan have been able to talk to one another. As part of a joint project of the U.S.Department of Transportation and the University of Michigan, the cars and trucks have been adapted to be able to communicate wirelessly and warn each other of potential accidents or backups. For instance, one vehicle could tell another when it’s approaching an intersection or if it’s stopping on the road ahead. The Michigan researchers think these wireless systems, if they become a standard feature, could cut accidents by 80 percent.

7) Car Talk was taken: MIT scientists are heading down the same road, developing something they calls CarSpeak. It’s a communication system for driverless cars that lets them “see” through the data provided by other cars on the road. And that would allow a car to cruise right through an intersection because it would know no other cars were coming.

Down the road

Here are a few other developments designed to help us get around:

• Not so mellow yellow: A researcher at Virginia Tech concludes that one of our big problems is yellow lights because they create what he calls a “dilemma zone” for drivers. He’s developing a system for giving drivers a few seconds notice when a light is about to turn yellow.
• We don’t need no stinking stretch limo: The largest buses in the world, 98-foot-long vehicles capable of carrying more than 250 people, will be rolled out in Dresden, Germany next month.
• Nothing makes an old man feel young like driving at night: According to a study at MIT, the most important car feature for drivers over 50 are smart headlights, which adjust the range and intensity of light based on the location of other cars. The idea is to reduce glare and improve visibility at night.
• I’m sleepin’ here: A new study of traffic noise levels in and around Atlanta found that almost 10 percent of the area’s population is exposed to traffic noise at a level described as “annoying.” And more than 2 percent live where traffic noise was described as “highly disturbing to sleep.”

Video bonus: How maddening are phantom traffic jams, you know, when everything slows to a crawl for no apparent reason? Here are two explanations, one from scientists, the other more like what we imagine.

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