The enforcement of Stage IV of GRAP, which bans BS-3 and BS-4 diesel vehicles, has disrupted travel and transportation, particularly for those engaged in the wedding business. The Central Pollution Control Board imposed GRAP-IV measures after Delhi's air quality index (AQI) entered the 'severe' category on Sunday. The restrictions, which came into effect at 8 AM Monday, aim to curb pollution caused by older diesel vehicles. However, the measure has had unintended consequences. Travel agencies report a sharp rise in demand for BS-6 and CNG vehicles, including cars like Ertiga, Innova, and traveller buses, as they scramble to meet commitments made before the ban. "The wedding season has added to the pressure. Many vehicles were pre-booked months in advance, and with this sudden ban, we had to scramble to adjust," said Sewak Tuar, a travel agency owner. "We are struggling to arrange new vehicles, the petrol, CNG, and BS-6 compliant ones, as weddings and transportation needs are bein