VDOT Big Walker Mountain Tunnel

Status: Planned

Description: 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 Southwestern 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 East River Mountain Tunnel

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


• traffic detector control


• traffic metering control


• video surveillance control

VDOT Big Walker Mountain Tunnel VDOT East River Mountain Tunnel

• road network conditions

VDOT Big Walker Mountain Tunnel Field EquipmentVDOT Big Walker Mountain Tunnel

• roadway dynamic signage status


• traffic detector data


• traffic images


• traffic metering status

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

• 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)