Insights on Site: Visit to the Regional Tangent West (RTW) Construction Site

Insights on Site: Visit to the Regional Tangent West (RTW) Construction Site
25 June 2025
Regionaltangente West (RTW) Neu-Isenburg, Germany
In June, approximately 20 employees from various CDM Smith offices and divisions, including the management team, had the opportunity to visit the construction site and gain valuable insights into the Regional Tangent West (RTW) infrastructure project in Neu-Isenburg, Germany. The visit was hosted by our colleague Heiko Huber, who is providing expert support on the project and shared detailed information with the guests.
CDM Smith employees visiting the RTW construction site in Neu-Isenburg CDM Smith employees visiting the construction site of the Regional Tangent West in Neu-Isenburg, Germany

The RTW is a large-scale transport project in the Rhine-Main region designed to alleviate the pressure on local public transport and create new, direct connections in the area surrounding Frankfurt through a ring-shaped railway network. The project encompasses approximately 52 kilometres of track for two new railway lines, 28 planned stops, numerous bridges and underpasses, as well as five independent planning approval sections.

A project of this scale involves not only complex technical demands but also requires close coordination with numerous stakeholders. The client consortium comprises 12 shareholders, alongside over 100 contracting units as well as separate project teams and contact persons for each of the five planning approval sections.

Our Services at a Glance

CDM Smith contributes across a broad spectrum of responsibilities within the RTW project. Including:

  • Construction supervision of structural engineering
  • Environmental construction supervision and waste management
  • Construction documentation
  • Health and safety coordination (SiGeKo)
  • Lean site management
  • Protocol management
  • Invoice verification
  • Immission control

The RTW represents a flagship project for both the region and CDM Smith. We are proud to support its success with our expertise and extend our sincere thanks to all involved for their dedication.

About CDM Smith

CDM Smith is a privately owned engineering and construction firm providing legendary client service and smart solutions in water, environment, transportation, energy and facilities. Passionate about our work and invested in each other, we are inspired to think and driven to solve the world's environmental and infrastructure challenges.