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Building Intelligent Control Networks for Tunnel Emergency Response

Location / Country : USA

Product Solutions:
EDS-608/EDS-611/EDS-616/EDS-619 Series

8, 8+3G, 16, 16+3G-port compact modular managed Ethernet switches


Industrial network management software designed for converged automation networks

Project Introduction
Caltrans (California Department of Transportation) planned to construct the fourth bore of the Caldecott Tunnel to relieve traffic congestion in the off-peak direction between Alameda and Contra Costa counties. To ensure traveler safety and improve traffic efficiency within the tunnel, Caltrans decided to install an emergency response system, which includes fire detectors, video image detection (VID) cameras, jet fans, variable message signs, and emergency stations. In an event of fire or earthquake, the emergency response system will be activated for mass evacuation, while a tunnel radio system will override other radio stations to broadcast emergency messages to motorists. In addition, Caltrans is also building an Operation and Maintenance Control (OMC) center near the tunnels for continuous traffic management.

System Requirements
The tunnel’s fire-life-safety emergency system is an infrastructure designed to detect and suppress a fire, and protect travelers. Linear heat detector (LHD) will be used to detect fires, and carbon monoxide detectors will be installed to monitor air quality. VID cameras will monitor traffic patterns and analyze images, notifying operators in case of an incident inside the tunnel. When abnormal conditions occur, the system will activate 19 jet fans that are installed with the ventilation system. There are also 17 emergency rooms equipped with fire extinguishers and emergency phones. The variable message signs and tunnel radio system will also provide real-time information to motorists.

For video, messaging, and emergency data updates transmission, the tunnel needs a big–bandwidth, high-density, and highly-reliable network for system communication. The ICS-G7850 industrial 48+2G 10GbE switches are installed both within the tunnel and in the new Operation and Maintenance Control (OMC) center as the communication backbone, while the EDS-611 8+3G-port modular switches are installed within the tunnel for data transmission. For video transmission, the VPort 461-T H.264 industrial video encoders are installed for multiple video streaming. For network monitoring and troubleshooting, Moxa’s MXview industrial network management software is also installed in the OMC.


Moxa Solution


 Application Requirements:

- Supports 10-gigabit fiber optic ports for video, messaging, and data transmission
- Redundant network connectivity to ensure real-time information updates and alerts
- Industrial-grade durability to withstand extreme conditions
Moxa’s Advantages:
- Comprehensive solutions for video encoders, industrial Ethernet switches, and network management software
- 10-gigabit uplink fiber ports to support video surveillance
- Reliable gigabit data transmission with sub-50 ms recovery time (@ 250 switch load)

Why Moxa


48G+2 10GbE layer 3 full Gigabit modular switch

- Full Gigabit capability to transfer large amounts of video, voice, and data across a network 

- Up to 10GbE fiber port uplinks

- Layer 3 switching to divide large networks into different subnets

- Turbo Ring, Turbo Chain, and RSTP/STP for network redundancy

8+3G-port compact modular managed switch

- Hot-swappable media modules for continuous operation

- Turbo Ring, Turbo Chain, and RSTP/STP for network redundancy

- IPv6 certified  

VPort 461-T
1-channel H.264 industrial video encoder 

- 3 simultaneous video streams for H.264 and MJPEG

- Video latency under 200 ms

- 2 Ethernet ports for cascade and Ethernet port redundancy

MXview-1000 node
Industrial network management software

- Event Playback feature records network events and replays past network incidents

- Auto-detects and visualizes network devices and physical connections automatically

- Provides central management of configurations and firmware for Moxa devices

- Integration with SCADA system and third-party network management software