A wire-loop vehicle detector is configured with a vertically oriented blade aligned at an angle to the direction of traffic-flow with each end of the blade extending laterally beyond the normal limits of vehicle presence over the blade. The extended blade configuration of the wire-loop constrains over-passing vehicles to present repeatable inductive signatures while electromagnetic noise and thermal-drift are selectively canceled using a secondary coil to increase the signal-to-noise ratio of inductance measurements. Inductive signatures of vehicles are recorded using a high-speed and high-precision method of making multiple successive measurements of the inductance of a wire-loop as vehicles pass over. Inductive signatures of automotive vehicles are useful for parking-lot revenue control, car-bomb detection, passive security of isolated communities, and other traffic-flow monitoring and control applications.

A service station for the sale and dispensing of fuel into customers' vehicles and a method of optionally delivering a transaction accounting thereof to the customer, wherein the receipt station is located separately from the fuel dispensers. Costs to manufacture and maintain a plurality of fuel dispensers are reduced by migrating this function to a single station. Upon fueling, an indicia is associated with each transaction, and this indicia is input at the receipt station to retrieve the associated transaction data. In the preferred embodiment, the indicia is sensed automatically by the receipt station via a transponder mounted on the customer's vehicle or carried by the customer.