The restrictions preventing some cars from entering the center of Athens have been lifted for the summer, marking the end of the so-called ?ring? based on license plate numbers, which began in 1982 to combat pollution and congestion.
From September 1, only low-emission cars will only be allowed to enter central Athens during peak hours.
Under the new scheme, only cars which comply with the Euro 5 emissions standard introduced in September 2009 will be allowed to drive into or through the center.
Vehicles that meet the Euro 4 standard but emit less than 140 g/km of carbon and hybrid cars will also be allowed access at all times.