Passenger Information System (PIS) for Buses: Displays, Announcements and How It Works

What a passenger information system for buses includes, how audio announcements and display screens stay in sync with GPS, and what operators should specify.

Short answer: a passenger information system (PIS) tells passengers where the bus is and what comes next, by voice and on a screen. An onboard unit uses GPS to work out the bus’s position on its route and triggers the next-stop announcement and the matching text on the display, with no action from the driver.

What does a PIS include?

• An onboard unit that stores routes, stops and audio.
• GPS, to know where the bus is.
• Audio output through the bus speakers.
• A passenger information screen showing the next stop.
• Route and stop data, configured for each service.

How does it work?

1. The unit receives the bus’s GPS position.
2. It matches the position against the stored route.
3. As the bus approaches a stop, it selects the announcement for that stop.
4. The audio plays and the screen shows the same stop name.

Why both audio and a screen?

• Audio reaches passengers who are not looking up, who cannot read the script, or who cannot see well.
• The screen reaches passengers who cannot hear well, are wearing headphones, or missed the announcement.

Together they make the service usable by more people, which is the purpose of passenger information.

What can it announce and display?

• The next stop and the final destination.
• A welcome message at the start of the trip.
• Safety messages: seat belts, luggage, emergency exits.
• Notice of meal and rest halts.
• Operator messages.

Which languages?

Announcements can be configured in several languages, for example English, Hindi and Telugu on routes in Telangana. Choose the languages your passengers actually speak on each route, and keep each announcement short so that the set does not run on.

Where is it used?

• City and state transport buses, where stops are frequent and passengers change constantly.
• Intercity coaches, where passengers sleep and drop points are spread through the night.
• Staff and school buses, for consistent stop information.

What should an operator specify?

1. Offline operation: routes and audio stored on the device, so it works without mobile signal.
2. Sync between audio and screen.
3. Use of the existing speakers, so no new audio system is needed.
4. Route updates without replacing hardware.
5. Clear, professionally recorded audio.
6. Screen position and brightness readable from the back of the bus.

How is it different from a simple announcement system?

An announcement system is the audio part. A passenger information system adds the display and treats the two as one, driven by the same GPS trigger. See how GPS-triggered announcements work and how they help operators and passengers.

AirFi’s GPS-based passenger announcement system runs on the same onboard unit as its passenger Wi-Fi, with a passenger information screen in sync. Talk to our team about your routes.

Frequently asked questions

Related solutions

• GPS-based passenger announcement system