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Verkehrsbetriebe Zürich (VBZ) public transport company, tender for tram tunnel cleaning services


The dual-track tram tunnel in Schwamendingen is 2.5 kilometers long and contains three stations below ground level (Waldgarten, Tierspital and Schörlistrasse), which are cleaned by an external service provider.

Drees & Sommer Switzerland was commissioned to support the client in the tender process and through to implementation.


Added Value

  • Updated performance and service descriptions, tailored to client requirements
  • New and comprehensive contractual framework with defined interface regulations and cost transparency

Project Data


Verkehrsbetriebe Zürich (VBZ), public transport company


Tram tunnel Schwamendingen, Zurich

Project term:

September 2019 - April 2020

Individual Services

  • Management of tender process
  • Cost, schedule and quality management
  • Support of the preparation of tender documentation
  • Preparation of service descriptions
  • Coordination of questions and answers
  • Support with the evaluation of offers
  • Support in award decision process
  • Implementation management

Location map