MAJOR firms have started tests on new black-box equipment which allows them to check on drivers. Several blue-chip companies are evaluating Fleetlogic, a computer-driven management information system launched six months ago.

The Warrington-based company's on-board computers cost from £645 for each vehicle but have been proved to effect an immediate average saving of 8% on fuel and salary costs. Fleetlogic is intended for non-tachograph vehicles up to 3.5 tonnes . Tachodisc also showed a simplified version of the black-box unit called Triplogic. Costing around £400, it allows drivers to detail private and business mileage at the touch of a switch.