You call your drayage company at 2 PM asking where your container is. The dispatcher puts you on hold, radios the driver, waits for a callback, and tells you "somewhere on I-95 heading to Doral." That was the standard experience five years ago. GPS fleet tracking replaced that guesswork with a live dot on a map that updates every 30 seconds.
How GPS Tracking Works on Drayage Trucks
A GPS tracking unit mounted in the truck cab pings satellites to fix its position. That position data flows to a cloud server through a cellular connection. The server logs the coordinates, speed, heading, and timestamp. Most modern units report every 15 to 60 seconds while the truck is moving, and drop to once every few minutes when parked.
Drayage companies install these units on each truck in the fleet. The hardware costs $100 to $300 per unit, with monthly service fees of $15 to $40 per truck. For a small fleet running out of Port Miami, the total investment is modest compared to what it saves in phone calls, missed appointments, and customer complaints.
The tracking data feeds into dispatch software. Dispatchers see every truck on a single map, color-coded by status: en route to port, at terminal, loaded and heading to delivery, returning empty. That same data can be shared with customers through a tracking link or portal login.
What Shippers See in a Tracking Portal
The shipper experience depends on how much the drayage company shares. At the basic level, you get a map with a truck icon and a timestamp. Better systems show a full timeline of the move.
Some carriers send these updates by text or email instead of (or in addition to) a portal. You get a message when the container clears the port gate and another when the driver is 30 minutes from delivery. For shippers who don't want to watch a map all day, automated notifications work better.
Fleet Tracking vs. Container Tracking
Fleet GPS tracking and container tracking are different systems that answer different questions.
Fleet tracking follows the truck. It tells you where the driver is right now and where they're headed. Once the driver drops the container at your warehouse and drives away, the tracking stops. You lose visibility.
Container tracking follows the box itself, from the origin port overseas through the ocean voyage, into the destination port, and through inland transit. Steamship lines like Maersk, MSC, and CMA CGM run their own container tracking portals. Those systems use terminal gate scans and vessel AIS data rather than GPS hardware on each box.
The gap between these two systems is where shippers lose visibility. The container gets released at Port Miami, and the steamship line's tracking shows "released." Your drayage company's GPS shows the truck picking it up an hour later. Between release and pickup, neither system has useful data. A good drayage company closes that gap with proactive dispatch notifications.
ETAs and Geofencing Alerts
Raw GPS coordinates on a map have limited value if you're managing a warehouse and need to know when to open the dock door. Two features turn tracking data into something useful: calculated ETAs and geofencing.
ETA calculation pulls the truck's current position, overlays live traffic data from Google or Waze APIs, and estimates arrival time. A container leaving Port Miami at 10:15 AM heading to a warehouse in Medley might show a 45-minute ETA that stretches to 55 minutes as I-95 traffic builds. The ETA adjusts in real time so your dock crew can plan around it.
Geofencing draws a virtual boundary around a location. When the GPS signal crosses that boundary, the system triggers an alert. Common geofences for drayage:
- Port terminal boundary (truck entered the port, truck exited with container)
- A 5-mile radius around the delivery warehouse (container is close, get the dock ready)
- A 1-mile radius around the empty return depot (driver is about to drop the chassis)
- The warehouse property line (truck arrived, clock starts on unloading time)
For importers receiving multiple containers per week, geofence alerts eliminate the need to check a tracking portal at all. Your warehouse management system can receive the alert and queue the dock assignment before the driver backs in.
What GPS Tracking Misses
GPS tells you where the truck is. It does not tell you everything happening to your cargo.
The tracker can't report whether the container seal is intact, whether the reefer unit is running at the correct temperature, or whether port police pulled the driver for a secondary inspection. It shows the truck parked at the port for two hours, but it won't explain why. That context still comes from the driver or dispatcher.
Port terminals also create GPS blind spots. The concrete and steel structures inside POMTOC and South Florida Container Terminal can block satellite signals. A truck weaving through the terminal yard might show position jumps or stale coordinates until it clears the gate. Some tracking systems handle this by flagging the truck as "in terminal" based on the entry geofence and suppressing erratic readings until the exit geofence triggers.
Cell coverage gaps are rare in the Miami metro area, but they happen in warehouse zones under highway overpasses and in underground parking structures. The tracking unit buffers data during outages and uploads the backlog when the connection returns. You might see the truck jump forward on the map as buffered points fill in.
Choosing a Carrier With Tracking
Not every drayage company in South Florida offers customer-facing GPS tracking. Smaller owner-operators might run a basic fleet tracker for their own dispatch but share nothing with shippers. Larger carriers and tech-forward companies offer full portal access or API integrations.
Questions to ask before booking:
- Do you provide a tracking link or portal for each container move?
- Can I get automated text or email alerts at key milestones (port exit, 30-min ETA, arrival)?
- Does your system calculate live ETAs with traffic data?
- Can I integrate your tracking feed into my TMS or warehouse management system via API?
- Are all trucks in your fleet tracked, or only some?
If a carrier can't answer these questions, they're running on phone calls and radio. That works when everything goes right. When a container is late and you're paying warehouse staff to stand around waiting, a tracking link is worth more than any discount on the drayage rate.
At One A Trucks, every move comes with real-time tracking. You get a link when the driver heads to the port and automated updates at each milestone through delivery. Our dispatch system calculates live ETAs so your warehouse crew knows when to open the dock, not when to start calling.