There is an environmental program, called Hoy No Circula ("Today Does Not Run", or "One Day without a Car"), whereby vehicles that have not passed emissions testing are restricted from circulating on certain days according to the ending digit of their license plates; this in an attempt to cut down on pollution and traffic congestion. While in 2003, the program still restricted 40% of vehicles in the metropolitan area, with the adoption of stricter emissions standards in 2001 and 2006, in practice, these days most vehicles are exempt from the circulation restrictions as long as they pass regular emissions tests. COUNT 4
QSN1 How do people know which days to not drive their car? ANS1 ending digit of their license plates QSN2 How many cars were still restricted in 2003? ANS2 40% QSN3 When were new emisson standards enacted? ANS3 2006 QSN4 How can cars get exempt from the restrictions? ANS4 pass regular emissions tests