NHAI exempts tankers carrying oxygen from toll fee on highways Updated: Updated: The outbreak of COVID-19 has created huge demand for LMO across the country. Share Article AAA Liquid Medical Oxygen being brought in tanker lorry and filled oxygen storage tanks at Government General Hospital, in Vijayawada. | Photo Credit: V. Raju The outbreak of COVID-19 has created huge demand for LMO across the country. The National Highways Authority of India (NHAI) on Saturday announced exempting tankers and containers carrying liquid medical oxygen (LMO) from user fee at toll plazas across national highways. Keeping in view the current unprecedented demand for the medical oxygen across the country due to COVID-19 pandemic, containers carrying LMO will be treated at par with other emergency vehicles such as ambulances for a period of two months or till further orders, NHAI said in a statement.