Delhi Integrated Multi-Modal Transit System Ltd.
A Joint Venture of Government of National Capital Territory
of Delhi & IDFC Foundation.
An ISO Certified Company  
Automatic Vehicle Location (AVL) System
Client : Transport Department, GNCTD

Scope of Work :
  • Project Conceptualisation
  • Software Development
  • Technology Selection & Specification
  • Project Execution
  • Project Monitoring including adherence to service level standards
These included the following activities:
  1. Bid Process Management
  2. Preparation of the System Requirement Specifications (SRS) document for review and sign-off by the Transport Department.
  3. Design and Development of a web based backend application software for the AVTMPS.
  4. Development of the integration software for tracking of buses in the GIS route-map of Delhi through web based access
  5. Setting up of data centre
  6. System Management & Monitoring
    • Overall System Level Activities
    • Unit Level Activities

To improve the efficiency, reliability and punctuality of the bus operations in Delhi and ensure optimal deployment of the fleet which would eventually lead to higher commuter satisfaction and improved level of confidence in bus services, Transport Department, GNCTD has decided to implement the Global Positioning System (GPS) enabled Automatic Vehicle Location (AVL) Project.
What is AVL?
The GPS enabled AVL allows real-time tracking of bus movement and provides information on its location. This information is then used along with other details such as the speed of the bus, the route followed etc to provide the passengers waiting at the bus stops with the expected arrival time of their bus. This information is displayed on LED boards installed at the bus stops as well as inside the buses. The AVL also helps in improving the efficiency of bus operation by generating various standard and exception.

System Layout
The system consists of the following major components
  1. The bus mounted GPS devices, with GPRS connectivity

  2. The back-end application which includes the following

    • i. Various master data residing in the database

    • ii. Module for assimilating real-time data from GPS devices

    • iii. Application layer for processing and analyzing real-time operation data for:

    • 1. Real-time prognosis purposes

    • 2. Data storage for MIS purposes

    • i. Operation data (stored in the database)

    • ii. Web based user interface for maintenance of data and for view and downloading of MIS

    • iii. Web and SMS based public interfaces for dissemination of prognosis data

  3. The LED Display boards located at various BQS
DIMTS has already successfully implemented, the Automatic Vehicle Location System in over 3800 buses with Passenger Information System on 90 bus queue shelters (BQS. It is in the process of rolling out coverage of the system on the entire bus fleet (11000 buses across both DTC and private stage carriage operators).
What makes this project truly unique is that after complete roll out, this will become the single largest public transit AVL system in the world. That apart, DIMTS has built the system to be device independent. While most AVL systems rely on a simple average speed of travel logic for display of ETA, DIMTS has implemented a unique self-learning algorithm for accurate calculation of ETA driven by historic travel speed data across road segments and time-of-day. The system has been developed with the capability to integrate with multiple map providers.