Control system migration and extension
In 2004 the Stuttgarter Straßenbahnen AG (SSB) transport authority commissioned an upgrade for their existing LIO-Classic control system. The soft migration option was decided on for the changeover to the new LIO system. This meant that control centre operation and all AVLC functions were largely unaffected and without major interruption.
During the course of the migration a further two contracts were added - providing the vehicles with the multifunctional displays (MFD) in 2008 and implementing an interface to the new depot management system the year after. The planned use of LIO demanded a comprehensive refit of the existing hardware, including the radio components. The earlier IBIS1 and IBIS2 on-board computers were replaced with the new IBISplus model, complete with GPS location. The analogue radio system was extended with GSM/GPRS and the depots were fi tted with wireless LAN.
The system at a glance
Stuttgarter Straßenbahnen AG (SSB)
SSB employs a staff of approximately 2800 and operates a total of 56 bus routes, 14 tram lines as well as a rack railway. With their 500 or so vehicles they carry around 600,000 passengers on a day-to-day basis through the week.