Wendy Zhang/Shanghai Daily news

From today, during the peak period between 7 a.m. and 8 p.m., vehicles seeking to enter the elevated highways within the city's Inner Ring Road (including the Inner Ring Road itself), Yan'an Elevated Road and Humin Elevated Road must carry stickers certifying that they are environmentally-friendly.
Car owners are required to post the stickers on their windshields. The existing 72 service outlets designated to handle applications for stickers will continue to provide the service.
Restricted vehicles are those failing to reach the National I emission standard, the so-called National First Phase Motor Vehicle Emission Standard. At present, a large number of vehicles far exceed the standard, with the pollutants seriously affecting air quality and residents' health. For vehicles needing appraisal, the owners should go to the 24 appraisal outlets as soon as possible. With the correct documentation, vehicles which cannot complete the checkup by today can still run on the restricted roads.
Counterfeit stickers have recently been advertised for sale online, and an official from the Shanghai Environmental Protection Bureau responded but failed to find the seller. According to the bureau, the stickers incorporate anti-counterfeiting techniques in terms of design, print and paper. After being posted, the stickers cannot be torn down completely. Moreover, each sticker has a bar code which has already been recorded into a vehicle's records.
Each car has only one sticker, with no compensation for loss. In the event of traffic accidents or damage to vehicles, owners may apply for reissue by presenting certificates from the traffic police, according to the bureau.