The Supreme Court on Tuesday upheld a December ruling that temporarily banned the sale of large diesel cars in New Delhi to combat toxic smog in the capital.
The carmakers had argued that their models were environment friendly as they adhered to emission norms.
Toyota cited its hybrid models such as the Prius, priced at about Rs 40 lakh, as a case in point while M&M spoke about its electric model Reva.
The top court has allowed entry of heavy commercial vehicles which are Delhi bound on payment of pollution cess, but has banned the entry of such vehicles from four additional entry points NH 2, 10, 58 and state highway 57 into Delhi.
The move bolsters Delhi government's odd-even ruling that saw a hassle-free Monday. Over 5,000 civil defence volunteers, Delhi traffic police and NCC personnel - 500 of whom were deployed across the city - were seen working in tandem to get the operation running.
Most, as per instructions given to them, were focussing on offenders driving luxury cars and large SUVs, and the volunteers were time and again reminded that the 'boss' was the traffic inspector whose instructions had to be followed.
Last week, Delhi Police chief BS Bassi warned against vigilantism by AAP volunteers to implement the odd-even plan. At a coordination trial held on 31 December - at the Chhatrasal Stadium for about 10,000 volunteers, and attended by officers of the Delhi government, traffic police personnel and Chief Minister Kejriwal - "no bathamizi (unpleasant behaviour) with commuters or with Delhi Police" was the clear message conveyed to the participants, said Shravan Singh, a Delhi University student and a civil defence volunteer at Ashram Chowk.