§ Ms HarmanTo ask the Secretary of State for Transport what tagging devices are currently being considered for road toll schemes; and how many of them involve radiation emissions. [3751]
§ Mr. WattsThree of the consortiums that we have invited to take part in our forthcoming trials offer, as part of their electronic tolling systems, tags which could emit low-level radio frequency transmissions, at levels well below those emitted by, for example, mobile telephones.