How to check & pay traffic challans online?

One can check pending traffic challans and pay fines through the government's eChallan portal at "echallan.parivahan.gov.in". Go to "eChallan Services", select "Check Pending Challan Status", and enter the challan number/vehicle/driving licence number to verify the details before making payment. Go to "Pay Challan" and follow the on-screen instructions to pay the fine and download receipt.