The CT4000 and CT3000 have a standardised meter roof light sensor which means the driver doesn't need to tell the system that he has gone PoB or Free; the Data unit can be wired to the meter roof light in order to detect when it is on or off, and automatically plot the vehicle free or PoB accordingly. Unlike many systems, this facility comes as standard.

But the CT4000 can go one major step further - using a dedicated meter interface to transfer fare and state information back to the CT4000 Fare Entry screen, thus virtually eliminating driver error when entering fare details.

When this system is used with the Auriga Printer and Swipe, an instant "Docket" can be created for the customer to sign. The CT4000 currently supports a range of Digitax, Cygnus and Hale meters.