Motorists with invalid FASTags cause congestion in Gurugram Updated: Updated: Barriers had to be lifted during peak hours to clear traffic snarls, says NHAI official Share Article AAA Vehicles queue up at the Kherki-Daula toll plaza on the first day of FASTag becoming mandatory on Tuesday. PTI | Photo Credit: - Barriers had to be lifted during peak hours to clear traffic snarls, says NHAI official The implementation of the National Highways Authority of India (NHAI) directions for mandatory digital payment through FASTags at its toll barriers from Tuesday faced little hiccups at Kherki Daula here with motorists not maintaining sufficient balance.