New Delhi, Feb. 26 -- Commuters looking to zoom past toll plazas on India's 1,46,560 km highway network will have to wait longer. Security concerns about surveillance cameras imported from countries like China have delayed the rollout of the barrier-free tolling system.

The National Highways Authority of India (NHAI) seeks to install the multi-lane free-flow (MLFF) system at around 1,150 toll plazas nationwide to allow vehicles to pass through at speeds of 100 km/h or more. Overhead gantries scan cars for toll tax, eliminating the need for physical barriers and reducing congestion and fuel consumption.

The system, to be rolled out across 21 plazas initially, relies on high-speed automatic number plate recognition (ANPR) cameras, which a...