After half a decade of hard times, US car manufacturers sold more automobiles last year to American customers than ever before. The cars Americans are driving are more fuel-efficient and typically loaded with electronic devices. But within a decade, manufacturers say drivers should expect semi-autonomous and fully autonomous cars that will make driving safer and less tiring.

In 2004 US military research agency DARPA challenged automotive engineers to try to build a self-driving car. Though the course had only simple obstacles and no other traffic, none of the vehicles reached the end.
Twelve years later the technology has advanced so far that manufacturers are testing it on roads with real traffic, trying to make it absolutely safe for both passengers and pedestrians.
“I figured if I was able to make a car that was smart enough to drive itself, I could probably make a car that was smart enough to be a bit safer. So from my perspective, safety has always been our priority," said Ford's James McBride.
Google admits that its experimental self-driving cars have had some close calls, but points out that in late 2014 incidents happened once every 1,300 kilometers, while last year they happened once every 8,500 kilometers.
And it's not just about the safety, manufacturers also have to make sure consumers are willing to let go of the wheel.
“We don't want to go too far too fast because the customer may not be expecting that. There's a learning curve that has to take place," said Kia's Joseph Steffey.
One thing that can help customers get used to not being in control is the driving simulator. Wearing virtual reality goggles drivers can experience the sensation of being passive behind the steering wheel.
Some cars are already equipped with electronics stemming from the DARPA Grand Challenge, such as laser proximity sensors, video cameras, lane-change warning lights and other devices.
Researchers say future cars will also be able to communicate with the world around them, such as pedestrians’ smart phones.
“We can see where that pedestrian is walking, and then we can actually pick them up if they walk out in front of the car, and the car will choose to stop," said Steffey.
Experts say that safe and affordable self-driving cars should be available to the average consumer within four to five years.
Vocabulary:
self-driving car: 自动驾驶汽车
体坛英语资讯:Pele: Ronaldino to be big surprise of Brazil s national team
体坛英语资讯:Real Madrid confirms captain Raul not play this season
体坛英语资讯:Ronaldo the hat-trick hero as top two win again in Spain
体坛英语资讯:Chinese gymnasts face tough challenge in London, head coach
体坛英语资讯:Anand, Topalov tie in seventh game at chess worlds
体坛英语资讯:World champ Zhang wins 3rd gold in China national swimming championships
体坛英语资讯:Burruchaga resigns as coach of Argentinas Arsenal
体坛英语资讯:Fluminense striker Fred sidelined for two weeks
体坛英语资讯:Higgins investigation now underway, to last weeks
体坛英语资讯:Bayern Munich locks 22nd Bundesliga title
体坛英语资讯:LeBron retains NBA MVP title
体坛英语资讯:Inter Milan loses in Barcelona but reaches Champions League final
体坛英语资讯:Tunisian club Esperance wins national league for second consecutive year
体坛英语资讯:Top strikers picked up in S. African World Cup squad
体坛英语资讯:Australian Robertson wins snooker world championship
体坛英语资讯:South African rugby captains injury not serious
体坛英语资讯:Suns Hill awarded third NBAs sportsmanship
体坛英语资讯:Bayern beat Lyon 3-0 to reach Champions League final
体坛英语资讯:Federer suffers loss to Gulbis at Rome Masters
体坛英语资讯:Beckham wont be back in action until November
体坛英语资讯:Real Madrid coach Pellegrini worried about winning nothing
体坛英语资讯:FC Barcelona beats Tenerife 4-1 to once again pressure Real Madrid
体坛英语资讯:Real Madrid coach Pellegrini optimistic ahead of Ossauna clash
体坛英语资讯:Hawks guard Crawford named Sixth Man of the Year
体坛英语资讯:Bayern appeals Riberys ban
体坛英语资讯:Dominik named Czech ice hockey player of year at 45
体坛英语资讯:Woods-Elin marriage to end
体坛英语资讯:FIFA happy with World Cup ticket sales
体坛英语资讯:Last-gasp Ronaldo goal keeps Real Madrid alive in title race
体坛英语资讯:90 percent of FIFA World Cup tickets sold
| 不限 |
| 英语教案 |
| 英语课件 |
| 英语试题 |
| 不限 |
| 不限 |
| 上册 |
| 下册 |
| 不限 |