The court has asked the government to file an account by Friday on how pollution has been impacted by the new traffic rules, which were introduced on January 1 for a two-week period to cut smog in the world's most polluted capital.
Cars with odd-numbered licence plates are allowed on the roads on odd-numbered dates, and those with even-numbered plates on the other days.
Transport Minister Gopal Rai told reporters that a fortnight's run is necessary to correctly assess the potential of the new restrictions in improving the quality of the city's air. He said the government will present this and other responses in court on Friday. "We have been saying since day one that public transport is not enough," he told reporters, reiterating the government's commitment to improving the number of buses and metro trains for commuters. He also said that Particulate Matter (PM) 2.5 caused by vehicular pollution is down in Delhi by about 30 per cent.
A report submitted by the government on the scheme so far was described as "vague" by the court today, which heard a series of petitions related to the traffic rules, including some seeking exemption for lawyers and senior citizens.
Schools have been ordered to remain closed for the period partly so that their buses can be used to ferry commuters to work.