Drees & Sommer coordinated the planning and public engagement for the Riederwaldtunnel as a major state highway project in Hessen.

Uniting opposites to create a world we want to live in Drees & Sommer is a partner-managed, global consulting company providing a single source of consultation and implementation services for the real estate, infrastructure and industrial markets. The company delivers sustainable, innovative, and economically viable solutions that meet each client’s unique needs. Founded in 1970 and long recognized as a pioneer in driving sustainability and digitization, today Drees & Sommer employs more than 6,500 people at more than 80 offices. The company’s interdisciplinary teams are involved in around 7,000 projects worldwide, working to create a livable future and unite concepts which can at face value appear to be opposites: tradition and future, economy and ecology, analog and digital, efficiency and well-being. As ‘intrapreneurs’, the Drees & Sommer Partners are personally responsible for managing the company. "the blue way"​ We think and act sustainably and holistically. In doing so, we take all facets of sustainability into account. Economy, ecology and functionality are inseparable for us. We call this basic principle ‘the blue way’. It pervades our entire company – internally and externally. ‘the blue way’ combines reason and emotion. Stringent, goal-oriented processes that allow space for creative freedom. In our projects, we always include the creative right hemisphere of the brain and the rational left hemisphere. This results in holistic thinking.