M6 Toll tag
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An M6 Toll tag is an electronic toll collection device attached to a vehicle's windscreen, which records the vehicle's passage through toll plazas on the M6 Toll, a motorway in the English midlands, in order to charge an account for use of the M6 Toll.
Each tag can only be used with the registered number plate and has a unique account. All accounts on the M6 Toll are pre-paid, and must contain a positive balance, sufficient to cover the cost of the vehicle's toll, in order for the vehicle to be allowed through the toll gate. If the balance is sufficient, the tag will beep once and the barrier at the toll gate will automatically raise. If the balance is low (less than three journeys remaining), the tag will beep twice. If the balance of the account cannot cover the cost of the toll, the barrier will remain closed and an alternative method of payment must be used. Balances can be topped up automatically once a month using Direct Debit or credit card, or by cheque.
The tags contain a microchip which uses Radio frequency identification (RFID) technology. Physically, the tag resembles a DART-Tag, as used to pay the tolls on the Dartford Crossing. However, the two systems do not interoperate.
