Global Navigation Satellite System (GNSS)-based Tolling

Context

The National Highway Authority of India (NHAI) has invited expressions of interest for the implementation of a satellite-based electronic toll collection system.

About:

Satellite-based tolling, also known as Global Navigation Satellite System (GNSS) based tolling, is a revolutionary approach to road pricing that uses highly accurate satellite position data to locate individual vehicles and calculate tolls.
Its implementation will involve an On-Board Unit (OBU), or a tracking device, fitted inside a vehicle whose location can be mapped using GAGAN, the Indian satellite navigation system with an approximate accuracy of 10 metres.
The co-ordinates of the entire length of the country’s national highways will have to be logged with the help of digital image processing, and software will be used to assign the toll rate on a particular highway, calculate the toll amount for a vehicle as per the distance travelled by it and then deduct it from a wallet linked to the OBU.
The system will additionally have gantries, or arches mounted with CCTV cameras, at various points on a highway for enforcement purposes.

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