Tunnel systems

Tunnel systems help ensure a safe environment for the tunnel user, providing ventilation and safety features appropriate for the tunnel and surrounding environment. In designing a new tunnel, it is vital that early consideration be given to ventilation issues.

Mott MacDonald's understanding of the inner relationship between tunnels design and tunnel ventilation results in a cost-effective design that optimizes system performance and the safety of the traveling public.

Our expertise includes the following:

  • Environmentally sensitive design to minimize adverse effects inside the tunnel and within the tunnel vicinity, including noise attenuation measures and integration of ventilation facilities with architectural features
  • Design and implementation of facilities for the safe collection and disposal of hazardous spills
  • Experience in analyzing levels of carbon monoxide and other pollutants in the tunnel environment and designing the ventilation system to maintain high air quality
  • Simulations of exhaust emissions, dispersion from tunnel portals, and designing measures to alter the dispersion pattern, such as changing the portal design or introducing a portal ventilation facility

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