Port Miami Tunnel
CODEL Air Quality Monitoring Beneath Miami's Biscayne Bay
The PortMiami Tunnel is a major transport link connecting PortMiami on Dodge Island directly with Miami’s interstate highway network. Running beneath Government Cut in Biscayne Bay, the twin tunnels provide direct access between the port, I-395 and I-95, helping divert cargo trucks, buses and other port traffic away from congested streets in Downtown Miami.
Opened to traffic in August 2014, each tunnel carries two traffic lanes and extends approximately 3,900 ft (1.2 km), reaching a depth of around 120 ft (37 m) below the surface of Government Cut at its deepest point.
CODEL air quality monitors form part of the tunnel’s extensive safety and ventilation infrastructure, continuously monitoring conditions within this critical transport link.
The Challenge
Maintaining safe air quality within a busy road tunnel requires continuous monitoring of changing atmospheric conditions. The challenge is particularly important at PortMiami, where the tunnel carries a mixture of passenger vehicles, buses and heavy goods traffic travelling to and from one of the United States’ major ports.
Within an enclosed tunnel environment, vehicle emissions can cause pollutant concentrations to rise rapidly. Ventilation must therefore respond effectively to changing traffic and air quality conditions while avoiding unnecessary operation when additional ventilation is not required.
With the tunnel operating 24 hours a day outside scheduled maintenance periods, reliable monitoring is essential to provide operators with continuous information on conditions throughout both tunnel bores.
The Solution
CODEL air quality monitors were installed throughout the PortMiami Tunnel to provide continuous measurement of atmospheric conditions and support the tunnel’s ventilation control system.
A total of eight air quality sensors monitor conditions within the tunnel, providing the data used to control 44 powerful ventilation fans. As air quality conditions change, the monitoring system enables ventilation to respond accordingly, helping maintain a safe environment for tunnel users.
Designed specifically for tunnel applications, CODEL’s air quality monitoring technology provides operators with reliable, real-time measurements required for effective ventilation management, helping balance tunnel safety with efficient system operation.
The Outcome
CODEL’s air quality monitors form part of a comprehensive safety system that allows the PortMiami Tunnel to operate around the clock while providing a direct highway connection to one of Miami’s most important economic assets.
By continuously monitoring tunnel conditions and providing data to control the 44 ventilation fans, the eight air quality sensors help ensure ventilation is available when required, maintaining suitable conditions for motorists while supporting efficient tunnel operation.
Alongside automatic incident detection, CCTV, fire suppression and other safety systems, continuous air quality monitoring contributes to the infrastructure required to safely manage traffic beneath Biscayne Bay.
