ETA (estimated time of arrival)

An ETA has three ingredients. The position, from a check call, a tracking link or the ELD. The drive time from that position to the next stop, which a routing engine calculates from real road speeds. And the driver’s clock: the hours of service left today, which decide whether the truck can finish the drive or must stop for a ten-hour break first.

The last one is what makes trucking ETAs different from consumer navigation. A truck 400 miles from the receiver at 4 p.m. with three driving hours left arrives tomorrow morning, and any ETA that says 11 p.m. is wrong before it is written down. Drivers know this and usually say “tomorrow, first thing” rather than a time, which is honest but not what the shipper’s portal wants.

For a broker, the ETA is a means to a comparison. Next to the appointment window it becomes one of three words: on track, at risk (arriving inside the last hour of the window), or late (arriving after it closes). That word is what decides whether anyone needs to act now: move the appointment, warn the customer, find a recovery truck. Tracking tools that show a map but not the comparison leave the dispatcher to do the arithmetic for every load on the board.