IVB - Innsbruck
Case Study Innsbrucker Verkehrsbetriebe und Stubaitalbahn GmbH (IVB)

Maximum safety in public local passenger transport

In order to obtain a reliable database for the bogies of its new tramways the Innsbrucker Verkehrsbetriebe und Stubaitalbahn GmbH has purchased a ROMER Absolute Arm. This mobile measuring arm not only provides the company with data for its guarantee claims, it also appeals because of its high measuring accuracy and because it is straightforward to use.

With almost 50 million passengers per year, Innsbrucker Verkehrsbetriebe und Stubaitalbahn GmbH (IVB) is one of the largest public local passenger transport operators in Austria. A workforce of 600 ensures that the transport of passengers along the 30 lines of the approx. 341 km long network proceeds reliably and safely. Because the 160 modern Mercedes Citaro busses and the 32 new tramways of the type Bombardier Flexity Outlook Cityrunner cover about 8.5 million kilometers in and around Innsbruck per year.

All accident repairs, servicing, maintenance and also the statutory inspections of all vehicles are carried out in an impressive workshop complex that offers a view of the Nordkette mountain range. So that staff are also available in emergencies, the workshop with its 100 employees is staffed from Monday to Sunday almost twenty-four hours a day.In the tramway team area a bogie with a measuring arm placed in its centre catches the eye immediately. “With the ROMER Absolute Arm, which we purchased just over a year ago, we aim to make changes to the bogie detectable”, explains Helmut Egger, deputy workshop manager at IVB. “Because of the way the bogie is built and how it can be measured, the measuring arm is not only the best option for us but probably the only alternative for measuring it.”

Comprehensive initial measurement
The event that triggered the investment in the measuring system was a heavy accident with one of the new tramways which were put into service between 2008 and 2011. Following the accident, the company was not able to determine with 100% certainty whether the bogie sustained any damage. Even when the unit that carries the tramway body and contains the drive unit - the motor and gearbox - was sent to Bombardier for investigation it was not possible to answer the question conclusively. Following the purchase of the measuring arm, the IVB is now in a position to properly assess whether there was any deformation to the bogie.

In order to obtain the necessary data an initial measurement of all 99 bogies was carried out. Each tramway has three bogies and in addition there are three reserve units. The measurement is carried out when the wheel rim is changed, which is due after two to three years of service. “While the actual measuring of the bogie takes three hours including setting up and recording, we need several days beforehand for the preparation of the unit. Because the bogie has to be cleaned and the wheel rims changed”, reports Helmut Egger. “After measuring the bogie we quickly fit it back into a vehicle because we only have a few reserve units. We therefore have to work with maximum efficiency...

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Hexagon Metrology s.r.o.
Litvínovská 609/3
190 00 Praha 9
Czech Republic

Pevná linka:
+420 272 680 830

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