A cardlock is an unattended fuel island built for commercial drivers. A fleet card unlocks the pump, so trucks fuel at any hour with no clerk on site.
A cardlock site has no store and no attendant. A driver pulls in, runs a fleet card at the pump, and the system unlocks it and records exactly who fueled, what they took, and which truck or driver it was for. The whole point is fueling without a person behind a counter.
It is built for fleets, not the public. Many sites carry diesel and high-flow pumps sized for big trucks, and access is limited to cardholders. Because there is no clerk and no storefront, the operator’s cost to run the site is low, and it can stay open around the clock.
For a fuel marketer, a cardlock is a way to serve commercial accounts with little overhead while capturing detailed records on every gallon. Those records feed billing, fuel tax reporting, and fleet controls that stop misuse. It is the wholesale-fueling cousin of the retail gas station.
In useThe trucking outfit fuels its rigs at the cardlock at four in the morning, each driver swiping a card so every gallon lands on the right truck’s bill.
Where the word comes from
The name describes the mechanism: the pump stays locked until a card unlocks it, so the site is a card-lock.
See also Cardlock network, End user