Best service available for passengers

Automatic vehicle location and control system LIO

Over 100 SmartInfo passenger information displays have been in use at the bus and light rail stops of Freiburg im Breisgau - and thus throughout the city‘s entire light rail system - since summer 2000. These displays form part of the LIO automatic vehicle location and control system (AVLC). Communication between the vehicles and displays takes place using an analogue quasi-synchronous radio system. The vehicle equipment boasts IBISplus G2 on-board computers and supports the system by means of logical location. Thanks to traffic light preemption and transfer protection, public transport is thus extremely attractive, punctual, and reliable. Passengers of Freiburger Verkehrs AG can require timetable information by SMS and receive a reply on their mobile phones in real time.


The functionalities

  • LIO automatic vehicle location and control system
  • Quasi-synchronous radio system
  • IBISplus G2 on-board computers
  • Logical location and infrared beacons
  • SmartInfo passenger information with acoustics
  • LIO-Data data supply
  • Loading and downloading of software and data to/from vehicles via WLAN
  • Transfer protection
  • DIVA/LIO-Data data coupling
  • Schedule information via SMS


The system at a glance

  • Control centre: 3 dispatcher workplaces, 1 stationary info station, 1 remote info station, control computer client G2 Radio system, Analogue quasi-synchronous radio system, 1 duplex data channel, 3 simplex voice channels, 3 base stations
  • Vehicles: 67 buses, 65 light rail vehicles
  • Dynamic passenger information: Over 100 SmartInfo displays with acoustics, controlled by radio communication
  • Depots: 1 central depot
  • Software interfaces to third-party components: DIVA planning program by MDV, IRMA passenger count system on some routes, evaluation of passenger numbers with planfahrt and ISAS2, AEG antenna system, PERDIS personnel planning (ID systems), EFA timetable information system


Freiburger Verkehrs AG

The buses and light rail vehicles of Freiburger Verkehrs AG (VAG) travel a distance equal to more than 18 times the distance between Earth and the moon each year. With 4 light rail and 28 bus lines, VAG enjoys a huge level of acceptance with customers. About 75  million passengers are carried by this transportation company each year.

“We are constantly expanding our programme to offer our passengers the best service possible. Needless to say
that our operations control system is constantly upgraded to the latest state of the art. One central focus of
attention in this respect consists in improving quality by expanding real-time passenger information.“
Oliver Benz, Unternehmensbereichsleiter Angebot und Betrieb, Freiburger Verkehrs AG