Assistive Passenger Information System on Buses

A Assistive Passenger Information System is being trialed on public buses to improve commuting experience for commuters with special needs.

A 3-year Assistive Technology trial is being conducted on Bus Services 139 & 141 from the 4th Quarter of 2020, following positive feedback from an earlier 6-month trial in January 2019. All buses on the 2 services will be fitted with a new Assistive Passenger Information System (APIS), while commuters with special needs can use the MAVIS Mobile Application.

Commuters with special needs may participate in the trial through registration with SG Enable via email at

Assistive Passenger Information System (APIS)

As part of the Assistive Technology trial, several buses plying Bus Service 139 between Toa Payoh and Bukit Merah were fitted with a new Driver Display Unit by INIT, next to the Trapeze Common Fleet Management System Driver Display Unit. This was first observed in mid-November 2018.

The INIT unit is at the heart of the Land Transport Authority (LTA)’s new Assistive Passenger Information System (APIS), which introduces several new features to improve the commuting experience for commuters with disabilities.

These driver display units indicate to Bus Captains if a Passenger with Disabilities (PWD) intends to board the bus further down the route. It provides the specific boarding stop, alighting stop, and nature of the person’s disabilities, enabling the Bus Captain to render assistance if required.

Background & Features

In December 2017, during the opening of the sheltered walkway from Redhill MRT Station to the Enabling Village, the Land Transport Authority (LTA) mentioned that it was exploring the use of technology (such as navigation apps and other mobility aids) to help commuters with disabilities. One of these initiatives was tying up with German firm INIT to provide audio announcements on public buses for the benefit of passengers with special needs.

The trial was also previously brought up during the Ministry of Transport’s (MOT) Committee of Supply (COS) Debate 2018, in which LTA indicated its collaboration with industry partners to develop and pilot assistive technologies for commuters with special needs. More details of the Assistive Passenger Information System (APIS) for buses were revealed, such as the inclusion of a mobile application that allows special-needs users to notify bus captains of their intention to board. For visually impaired passengers, there will be internal and external speakers to announce the service number, destination, and the next bus stop. It also directly transmits audio announcements via hearing aids to hearing-impaired passengers. The trial was then slated to start in 2018 on Bus Service 139, which serves the Enabling Village.

The first beta version for the mobile application was uploaded on the Google Play Store on 15 November 2018. Titled MAVIS, short for Mobility Assistance for the Visually Impaired and Special users, the app is developed in partnership with LTA and INIT Asia-Pacific Pte Ltd (Parent Company: INIT GmbH) and is based on the existing DEPARTURESlive app offered by INIT to public transport operators Verkehrsbetriebe Karlsruhe (VBK) and Albtal Verkehrsgesellschaft (AVG) in Germany. In late November 2018, the beta app was subsequently removed from the Google Play Store, until its official launch in late January 2019.

The app lists only a limited number of bus stops on the map, in particular, only bus stops served by Bus Services 139, 139M & 141. While the beta app had stops served by Service 238 initially, these stops were removed in late November 2018.

MAVIS App Trial

The six month trial of the MAVIS mobile application started on 28 January 2019, although it was officially announced by the LTA only two days later (30th January). The trial is co-funded by the Land Transport Innovation Fund and INIT Asia-Pacific Pte Ltd.

The MAVIS App aims to:

  • Provide commuters with personalised journey guidance, such as the estimated time of arrival and notifications to board or alight the bus
  • Alert bus captains that commuters with special needs will be boarding or alighting, enabling bus captains to render assistance accordingly
  • Allow visually impaired passengers to activate audio announcements at the boarding bus stop.

Three buses have been installed with the APIS, which includes the display unit that interfaces with the MAVIS Driver Interface tablet. They will be deployed on:

  • Bus Service 139: 28 January 2019 to end-April 2019
    Serves the Enabling Village at Lengkok Bahru
  • Bus Service 141: May 2019 to end-June 2019
    Serves the Singapore Association Of The Visually Handicapped (SAVH) at Toa Payoh Rise (near Caldecott MRT Station)

During the six-month trial period, LTA may adjust parameters, such as the volume of the audio announcements, to better test the system. At the end of the trial, LTA will consider users’ feedback gathered during the trial to assess the benefits and feasibility of providing such assistive technologies on more public bus services.

MAVIS Mobile Application

Since the mobile application was developed by INIT, the user interface is adapted from a similar app used in Germany. The app uses “Line” instead of service number, and bus stops do not have their bus stop codes or road names reflected on them.

Travel Companion
MAVIS App - User Profile Settings
MAVIS App – User Profile Settings

The Travel Companion feature within the mobile app provides real-time information on when to board and alight. The feature is disabled by default and can only be activated through a password provided by SG Enable.

Commuters with special needs may participate in the trial through registration with SG Enable via email at, following which they will be able to activate the user profiles within the app.

Profiles which are enabled through the password include:

  1. Wheelchair
    (Bus Captain is notified on the intended boarding point upstream)
  2. Visually Impaired
    (Service number and direction of the bus announced through external speakers at requested boarding stop)
  3. Hearing Impaired
    (Internal announcements transferred to hearing aid via T-coil)

Buses Installed

For the 2019 trial, 3 Scania K230UB Buses had the APIS installed. These buses are:

  • SBS5051X
  • SBS5215R
  • SBS5236E

SBS5051X and SBS5236E had their APIS installed earlier in November 2018. Buses installed with APIS can be located through the MAVIS App.

On-Board Bus Equipment

As part of the Assistive Passenger Information System (APIS), several additional pieces of equipment will be installed on buses plying the selected trial services. These include:

  • Driver Display Unit to inform Bus Captains of disabled passengers intending to board the bus further down the route, so that Bus Captains are able to render assistance if necessary
  • Induction loop aerial towards the rear of the bus (marked as T-Loop area) for internal stop announcements transmitted to hearing aids
  • Internal Speakers on board the bus, for the broadcasting of bus stop announcements
    – A total of sixteen speakers are installed within the Scania K230UB bus, supplied by Visaton
  • External Speaker to announce the service number and direction at bus stops

ITSWC Exhibition

A booth on the Mobility Assistance for the Visually Impaired and Selected Users was set up by LTA during the 26th Intelligent Transport Systems World Congress held at Suntec Singapore Convention and Exhibition Centre in October 2019.

2020 Trial Expansion

With the positive feedback from commuters regarding the 2019 trial, the mobile application trial would be expanded for 3 years beginning from the 4th Quarter of 2020.

For the expanded trial, all buses deployed on Bus Services 139 & 141 would be installed with the APIS. This was announced during the Ministry of Transport’s Committee of Supply Debate 2020.


External Links & References

2 thoughts on “Assistive Passenger Information System on Buses

  • 13 December 2023 at 4:25 PM

    I only just want next stop annoucment

  • 20 March 2019 at 11:25 AM

    To The Person In Charge,

    I would like to know, people like me, who is a disabled handicapped, with partial visually impaired, with not strong legs; where am i belong to?

    To none of the categories?

    I do have the disability consession card given by the government.

    You can also check with Handicaps Welfare Association or Visually Handicapped Association, or even SNEC.

    May you let me know soon.

    Thank you.


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