What is the TamarTag?
TamarTag is name of the Electronic Tolling System for the Tamar Bridge and Torpoint Ferry Crossings.
TamarTag is an Automatic Vehicle Identification System which allows you to travel Eastbound across the Tamar Bridge almost without stopping whilst receiving a 50% discount on the cash toll. TamarTags can also be used at Torpoint Ferry with the same discount percentage.
More information can be found on the TamarTag page under TamarTag Details.