TMS guide
How a TMS Uses GPS Data
A tracking feed is worth what the system around it can do with it. These are the four places a position actually changes an outcome.
- Arrival and departure timestamps are the highest-value use, because they feed billing.
- Detention is the clearest dollar case: unbilled waiting time is the most commonly lost accessorial.
- A position without a load reference cannot be billed, disputed, or audited.
1. Arrival and departure status
A geofence around a stop turns a stream of coordinates into two timestamps: arrived and departed. Those two events are what dispatch, the customer portal, and the invoice all key off. Everything else in this list is downstream of getting them right.
The failure mode is a device that reports too rarely. A tracker sending a position every four hours cannot tell you a trailer sat for ninety minutes, so the geofence event is wrong or missing. See what is a geofence for why reporting interval decides this.
2. Dwell and detention
Detention is the most commonly under-billed accessorial in trucking, because it depends on remembering to record a wait that happened days earlier. Derived arrival and departure times make it automatic: the system knows the truck was there for three hours and can flag the load for review before the invoice goes out.
3. Proof of delivery support
A signed POD says the freight arrived. A timestamped position attached to the same order says when, and where. When a customer disputes a delivery window, the combination is considerably harder to argue with than either alone.
4. Equipment location for planning
Knowing which trailers are empty and where they sit changes what dispatch can commit to. This is the use case that needs asset hardware rather than driver-app position, because the trailers in question are by definition not attached to a driver.
What none of this does
Position data does not create Hours-of-Service records, does not satisfy an ELD mandate, and does not itself constitute a compliance program. See ELD vs TMS vs GPS tracker for the boundaries.
Related reading
Questions
What does a TMS do with a GPS position?
It attaches the position to a load and a stop, then derives status: en route, arrived, loading, departed. Those derived events drive customer updates, dwell reporting, and accessorial billing.
Can GPS data support a detention claim?
It helps. A timestamped arrival and departure attached to the order is far stronger evidence than a driver’s recollection. Whether it is accepted depends on the customer’s contract terms.
Does this need dedicated hardware?
Not always. Driver-app or ELD position covers powered units on many fleets. Dedicated hardware matters for trailers and equipment that travel without a driver.
Is TruckerPro TMS available today?
Yes. TruckerPro TMS is a live product for Canadian carriers at truckerpro.ca. The private-pilot notice on this site refers to TruckerPro GPS hardware, which is a separate and unlaunched project.
Share a pilot use case
Tell us what you would track and where it operates. This records interest; it does not place an order.