How Does GPS Fleet Tracking Work? From Site Visits to Job Hours

Published: October 21, 2026

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Introducing Simtrac 360

Simtrac 360 is fleet tracking built directly inside Simpro. It runs with your Simpro sign-in, matches site visits to jobs and pushes job hours in, links vehicles to your Simpro asset records, and supports multiple maintenance plans per vehicle. The plug-and-play tracker installs through the OBD2 port in minutes.

Vehicle data is only useful when it lands where the work is managed.

Discover Simpro GPS Fleet Tracking

How does GPS fleet tracking work?

It combines vehicle location data with timestamps to show when a vehicle reaches and leaves a job site. When that information is connected to the job workflow, a visit can be matched to scheduled work, helping office teams reconcile job hours, mileage and vehicle records without moving between separate systems.

It is Friday afternoon and someone in the office is lining up a driver's notes against a map and a list of jobs. Nobody enjoys it, and everybody knows some hours will not make it onto the invoice. For the broader timesheet problem, see Why Accurate Time Tracking Is Still Broken in Field Service.

What GPS Fleet Tracking Can — and Cannot — Tell You

A tracker that lives in its own portal answers one question: where was the vehicle? It cannot answer the question your business depends on being answered: how much time did we spend on this job?

That gap shows up as:

  • Hours typed in by hand: every re-keyed arrival and departure is admin time, and every missed one is revenue you did the work for and did not bill.
  • Records that drift apart: odometer readings in one place and the asset record in another means service decisions made on old numbers.
  • Two logins, two sets of users: the more systems it takes, the less often anyone checks.

How GPS Fleet Tracking Turns Site Visits Into Job Hours

The shift is simple: stop treating vehicle data as a report to read and start treating it as an input to the job.

  1. Capture the vehicle's location and timestamps.

  2. Define the customer site with a geofence.

  3. Record when the vehicle enters and leaves the site boundary.

  4. Match the visit window to the scheduled job.

  5. Review the captured time before it becomes part of the job record.

Site visits that become hours. When a vehicle arrives at a site and leaves, the visit automatically syncs to the job and the hours get recorded, with time on site and mileage visible from the jobcard.

Sites set up once. Geofences belong in the site record, not in a second portal that needs separate editing.

Service schedules that follow the vehicle. Run one or multiple maintenance cycles per vehicle, triggered by date, odometer or engine hours, so an annual inspection cycle and a service cycle do not compete for a single due date.

GPS Tracking vs Geofencing: What Is the Difference?

GPS tracking records where a vehicle is and how it moves over time.

A geofence is a digital boundary around a specific location, such as a customer site. Used together, they can turn raw location data into arrival and departure events that are easier to connect with the relevant job.

Why Connected Fleet and Job Data Matter

  1. Less admin: arrivals and departures stop being typed in.
  2. Fewer missed hours: the driver’s time on site is matched to the job automatically.
  3. Asset records you can trust: odometer and engine hours push to Simpro on a schedule.

Frequently Asked Questions

How does GPS fleet tracking work?

A vehicle tracker records location and timestamp data. Geofences can turn that raw location data into arrival and departure events for defined sites.

Can GPS fleet tracking help verify time spent on site?

Location and timestamp data can show when a vehicle entered and left a geofenced site. Whether that becomes a timesheet entry depends on how the fleet-tracking and job-management systems are connected.

What is vehicle geofencing?

Vehicle geofencing uses a digital boundary around a physical location. When a tracked vehicle crosses the boundary, the system can record an entry or exit event.

What is the difference between GPS fleet tracking and fleet management software?

GPS fleet tracking focuses on vehicle location, movement and site events. Fleet management software is a broader category that can include maintenance, compliance, fuel, routing and other operational workflows. The line between them is blurring: when tracking is built into the system that runs your jobs, it can cover the core fleet functions, such as live location, alerts, mileage and maintenance, alongside the job and asset records.

How can fleet tracking data connect with job management software?

A connected workflow can associate vehicle arrival and departure events with a scheduled job, giving office teams location-based data to review alongside job hours and records.

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