Goa, Nov. 4 -- Delhi's efforts to tackle worsening air pollution with the onset of winter have led to another challenge, with restrictions on non-BS6 compliant petrol and diesel vehicles triggering massive traffic congestion at the city's entry points.

An NDTV ground report from two major entry points - Chilla and Ghazipur borders - on Tuesday highlighted long queues, kilometre-long traffic jams and slow-moving vehicles as traffic police conducted checks to verify compliance with BS6 emission standards.

Vehicles that failed to meet the prescribed norms were turned back, leading to further congestion at the border checkpoints. Several vehicles were also seen idling for extended periods as motorists waited for their turn to undergo verifi...