I-64 Afton Mountain Safety Improvements: Exit 99 Interchange Lighting

Project Description: The I–64 Afton Mountain Safety Improvements: Exit 99 Interchange Lighting project will upgrade lighting on Interstate 64 at the exit 99 interchange on Afton Mountain in Augusta County. This will help motorists to safely navigate the interchange at night and during low visibility conditions to improve traffic safety.

Project Status: Planned

Project Stakeholders:

• VDOT Central Office
• VDOT NWRO Region

Project Service Packages:

• ST04: Roadside Lighting (Afton Mountain Exit 99 Interchange Lighting)
• WX02: Weather Information Processing and Distribution (Afton Mountain Exit 99 Interchange Lighting)
• TM06: Traffic Information Dissemination (Afton Mountain Exit 99 Interchange Lighting)

Project Information Flows:

Information Flow	Source Element	Destination Element	Status
environmental conditions data	VDOT Afton Mountain Fog Warning System	VDOT NWRO TOC/ATMS	Planned
lighting system control data	VDOT NWRO TOC/ATMS	VDOT Staunton District Field Equipment	Planned
lighting system status	VDOT Staunton District Field Equipment	VDOT NWRO TOC/ATMS	Planned
roadway dynamic signage data	VDOT NWRO TOC/ATMS	VDOT Staunton District Field Equipment	Planned
roadway dynamic signage status	VDOT Staunton District Field Equipment	VDOT NWRO TOC/ATMS	Planned
traffic operator data	VDOT NWRO TOC/ATMS	VDOT NWRO TOC/ATMS Operator	Planned
traffic operator input	VDOT NWRO TOC/ATMS Operator	VDOT NWRO TOC/ATMS	Planned
transportation weather information	VDOT ESS Weather Platform	VDOT Afton Mountain Fog Warning System	Planned
weather information	National Weather Service	VDOT Afton Mountain Fog Warning System	Planned

Project Functional Requirements (Element - Functional Object):

• VDOT Afton Mountain Fog Warning System - TMC Environmental Monitoring
• 1: The traffic center shall remotely control environmental sensors that measure road surface conditions including temperature, moisture, icing, salinity, and other measures.
• 2: The traffic center shall remotely control environmental sensors that measure weather conditions including temperature, wind, humidity, precipitation, and visibility.
• 3: The traffic center shall assimilate current and forecast road conditions and surface weather information using a combination of weather service provider information (such as the National Weather Service and value-added sector specific meteorological services), data from roadway maintenance operations, and environmental data collected from sensors deployed on and about the roadway.
• 4: The traffic center shall receive road condition information from weather service providers.
• 6: The traffic center shall share the collected environmental data with Maintenance and construction operations.


• VDOT ESS Weather Platform - MCM Environmental Information Processing
• 3: The center shall use the various data inputs of environmental sensors and road weather data to develop a view of current and predicted road weather and road conditions.


• VDOT NWRO TOC/ATMS - MCM Environmental Information Processing
• 1: The center shall respond to control data from center personnel regarding environmental information processing.
• 3: The center shall use the various data inputs of environmental sensors and road weather data to develop a view of current and predicted road weather and road conditions.


• VDOT NWRO TOC/ATMS - TMC Environmental Monitoring
• 4: The traffic center shall receive road condition information from weather service providers.
• 7: The traffic center shall provide drivers road weather advisories.


• VDOT NWRO TOC/ATMS - TMC Lighting System Control
• 1: The traffic management center shall remotely control electrical lighting systems.
• 2: The traffic management center shall collect lighting system operational status from the field and compare against the control information sent by the center.


• VDOT NWRO TOC/ATMS - TMC Traffic Information Dissemination
• 1: The center shall remotely control dynamic messages signs for dissemination of traffic and other information to drivers.
• 3: The center shall collect operational status for the driver information systems equipment (DMS, HAR, etc.).


• VDOT Staunton District Field Equipment - Roadway Lighting System Control
• 1: The field element shall control lighting systems along the roadside under center control.
• 2: The field element shall return operational status for the lighting system equipment to the center.


• VDOT Staunton District Field Equipment - Roadway Traffic Information Dissemination
• 1: The field element shall include dynamic message signs for dissemination of traffic and other information to drivers, under center control; the DMS may be either those that display variable text messages, or those that have fixed format display(s) (e.g. vehicle restrictions, or lane open/close).
• 3: The field element shall provide operational status for the driver information systems equipment (DMS, HAR, etc.) to the center.

Standards:

• US: NTCIP Lighting - SNMPv3/TLS
• US: NTCIP Message Sign - SNMPv3/TLS
• US: TMDD - NTCIP Messaging

Project Operational Concepts:

Roles and Responsibilities

• VDOT Central Office
• Operate and maintain VDOT ESS Weather Platform.


• VDOT NWRO Region
• Communicate driving condition alerts via DMS signs.
• Monitor environmental conditions and respond with lighting activation during fog events.
• Operate and maintain Afton Mountain Fog Warning System.
• Operate and maintain interchange lighting system.