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Operations

AVL (Automatic Vehicle Location): Automatic Vehicle Location

Definition
A system that uses Global Positioning System (GPS) technology to remotely track the real-time geographic location of a vehicle. In NEMT, this data is transmitted to dispatch software to monitor fleet movements.

Overview

Why it Matters

AVL is the "source of truth" for billing and compliance. It proves the vehicle was actually at the pick-up location at the scheduled time, preventing fraud (e.g., "Ghost Trips").

How it Works

A GPS device (hardwired or via a driver mobile app) pings the satellite and sends coordinates (latitude/longitude) to the central server every 3–60 seconds.

Code Comparison

Comparison: AVL vs. GPS Navigation

AVL is the reporting mechanism (telling the dispatcher where the driver is). GPS Navigation (like Google Maps) is the guidance mechanism (telling the driver where to go).

Common Questions

  • Dead Zones: Losing tracking data in rural areas, creating gaps in the "breadcrumb trail" needed for claims.
  • Privacy Mode: Drivers intentionally disabling location services on mobile devices to hide unauthorized stops.
  • Set the "ping rate" to at least every 30 seconds for accurate mileage reimbursement.
  • Use "Geofencing" (see term) linked to AVL to automatically trigger "Arrived" statuses.

Sources

Federal Transit Administration - AVL Technologies