---

VDOT Big Walker Mountain Tunnel

Status:

Existing

Definition:

The Big Walker Mountain Tunnel is a vehicular tunnel in the Appalachian Mountains of Southwest Virginia that carries Interstate 77 through/under Big Walker Mountain. This tunnel has its own system that includes Sixty Cameras, VMS and Traffic Signals and it shares data with VDOT Salem TOC. Currently it does not have any connection to the other Tunnel system in this area named East River Mountain Tunnel but eventually these two systems will be connected.

Stakeholder:

VDOT SWRO Region

Architecture Flow Diagrams
which include VDOT Big Walker Mountain Tunnel:

• VDOT Big Walker Mountain Tunnel VDOT Big Walker Mountain Tunnel Field Equipment
• VDOT Big Walker Mountain Tunnel VDOT Big Walker Mountain Tunnel SSP Vehicles
• VDOT Big Walker Mountain Tunnel VDOT East River Mountain Tunnel
• VDOT Big Walker Mountain Tunnel VDOT SWRO TOC/ATMS

Architecture Flows
to/from the VDOT Big Walker Mountain Tunnel:

VDOT Big Walker Mountain Tunnel VDOT Big Walker Mountain Tunnel Field Equipment

• roadway dynamic signage data


• signal control commands


• signal control device configuration


• signal control plans


• signal system configuration


• traffic detector control


• traffic metering control


• video surveillance control

VDOT Big Walker Mountain Tunnel VDOT Big Walker Mountain Tunnel SSP Vehicles

• emergency dispatch requests


• suggested route

VDOT Big Walker Mountain Tunnel VDOT East River Mountain Tunnel

• emergency plan coordination


• emergency traffic control information


• emergency traffic coordination


• evacuation coordination


• incident information


• incident response coordination


• resource coordination


• road network conditions


• traffic images

VDOT Big Walker Mountain Tunnel VDOT SWRO TOC/ATMS

• emergency plan coordination


• emergency traffic coordination


• evacuation coordination


• incident information


• incident response coordination


• resource coordination


• road network conditions


• traffic images

VDOT Big Walker Mountain Tunnel Field EquipmentVDOT Big Walker Mountain Tunnel

• roadway dynamic signage status


• signal control status


• signal fault data


• traffic detector data


• traffic images


• traffic metering status

VDOT Big Walker Mountain Tunnel SSP VehiclesVDOT Big Walker Mountain Tunnel

• emergency dispatch response


• emergency vehicle tracking data

VDOT East River Mountain TunnelVDOT Big Walker Mountain Tunnel

• emergency plan coordination


• emergency traffic control information


• emergency traffic coordination


• evacuation coordination


• incident information


• incident response coordination


• resource coordination


• road network conditions


• traffic images

VDOT SWRO TOC/ATMSVDOT Big Walker Mountain Tunnel

• device control request


• device data


• device status


• emergency plan coordination


• emergency traffic coordination


• evacuation coordination


• incident information


• incident response coordination


• resource coordination


• road network conditions

National ITS Architecture Subsystems
mapped to the VDOT Big Walker Mountain Tunnel:

• Archived Data User System Terminator
• Emergency Management Center Subsystem
• Traffic Management Center Subsystem

National ITS Architecture Services
associated with VDOT Big Walker Mountain Tunnel:

• TM24 - Tunnel Management (Tunnel Guide Lights for Speed Management) -- (Graphic)

National ITS Architecture Functional Requirements
associated with VDOT Big Walker Mountain Tunnel:

none