Motor vehicles are considered a major source of pollution.
Motorists over 70 are considered to be amongst the safest on the road。 Many avoid rush-hour and late-night driving and are said to cause fewer accident-related injuries than younger drivers。
On Thursday, city environment councillor Ines Sabanes said the ban would not be extended as smog levels had dropped by the required amount. Other measures, including a ban on street parking for non-residents and reduced speed limits, will continue.
老年人常常有被以为是最安全的的哥群众体育。他们常常不会在畅通高峰时分上路，发惹祸故的机率也比年轻司机小比超级多。可是更加多的老龄的哥在英帝国被撤消驾驶许可证了，原因是怎么样吧？请听 Judith Moritz 的报纸发表：
Madrid has ordered half of most private cars off the roads on Thursday to tackle worsening air pollution, a first in Spain.
The restrictions will operate between 6.30am and 9pm. The city council said in a statement: “vehicles with even-number registration plates will be allowed to drive around on even-number days and cars with odd-number registration plates on odd-number days”.
“It’s not about traffic restrictions but about the important issue of public health,” deputy mayor Marta Higueras said. “Lots of people suffer from breathing problems and are very affected by pollution.”
China's capital, Beijing, has announced measures to combat worsening air pollution, state-run media report.
The new system will give out four different degrees of air pollution warning - blue, yellow, amber and red, Xinhua news agency reports.
There are exceptions to the ban, such as for mopeds, hybrid cars, those carrying three people or more or used by disabled people. Buses, taxis and emergency vehicles are also exempt.
The system will be based on a vehicle's licence plate - odd numbers will be allowed on the roads one day, even numbers the next.
They include taking half of the city's four million private cars off the roads on days when there are serious levels of pollution.
But more of them than ever are being stopped from driving for medical reasons。 In 2011 just over 10，000 over-70s were banned because of their health。 By last year， that figure had risen by a third to nearly 13，000 drivers。
Cars drive on a motorway towards Madrid, Spain December 28, 2016
The measure is activated when levels of harmful nitrogen dioxide in the atmosphere go above 200 microgrammes per cubic metre in at least two measuring stations for two days running, and if the air is unlikely to clear imminently.
The DVLA （Driver and Vehicle Licensing Agency） says it is not clear why there has been such a surge in the number of older drivers losing their licence on health grounds。
Four of world's biggest cities to ban diesel cars from their centres
on health grounds基于健康理由