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I-95 Variable Speed Limits

Project Description: The I–95 Variable Speed Limits (VSL) is a pilot project to implement VSL on the northbound lanes of I–95 between mile markers 115 and 130, near Fredericksburg. This area is characterized by day–to–day speed variability and high crash rates. The project objective is to reduce speed variability, improve throughput, and reduce crashes through the use of VSL that is responsive to real–time traffic conditions.

Project Status: Planned

Project Stakeholders:
Project Inventory:

Project Service Packages: Project Information Flows:

Information Flow Source Element Destination Element Status
data publication VDOT NOVA VSL Data Lake Private Sector ISP Centers Planned
data publication VDOT NOVA VSL Data Lake VSP Center - MPSTOC Planned
data query Private Sector ISP Centers VDOT NOVA VSL Data Lake Planned
data query VSP Center - MPSTOC VDOT NOVA VSL Data Lake Planned
data query publication VDOT NOVA VSL Data Lake Private Sector ISP Centers Planned
data query publication VDOT NOVA VSL Data Lake VSP Center - MPSTOC Planned
data subscription Private Sector ISP Centers VDOT NOVA VSL Data Lake Planned
data subscription VSP Center - MPSTOC VDOT NOVA VSL Data Lake Planned
environmental conditions data status National Weather Service VDOT NOVA MPSTOC - TOC/ATMS Planned
qualified environmental conditions data National Weather Service VDOT NOVA MPSTOC - TOC/ATMS Planned
roadway dynamic signage data VDOT NOVA MPSTOC - TOC/ATMS VDOT NOVA MPSTOC - TOC DMS Planned
roadway dynamic signage status VDOT NOVA MPSTOC - TOC DMS VDOT NOVA MPSTOC - TOC/ATMS Planned
traffic detector control VDOT NOVA MPSTOC - TOC/ATMS VDOT NOVA MPSTOC - TOC Detection Planned
traffic detector data VDOT NOVA MPSTOC - TOC Detection VDOT NOVA MPSTOC - TOC/ATMS Planned
traffic image meta data VDOT NOVA MPSTOC - TOC CCTV Cameras VDOT NOVA MPSTOC - TOC/ATMS Planned
traffic images VDOT NOVA MPSTOC - TOC CCTV Cameras VDOT NOVA MPSTOC - TOC/ATMS Planned
variable speed limit control VDOT NOVA MPSTOC - TOC/ATMS VDOT NOVA VSL Signs Planned
variable speed limit control VDOT NOVA MPSTOC - TOC/ATMS VDOT NOVA VSL Static Signs Planned
variable speed limit status VDOT NOVA VSL Signs VDOT NOVA MPSTOC - TOC/ATMS Planned
variable speed limit status VDOT NOVA VSL Static Signs VDOT NOVA MPSTOC - TOC/ATMS Planned
video surveillance control VDOT NOVA MPSTOC - TOC/ATMS VDOT NOVA MPSTOC - TOC CCTV Cameras Planned


Project Functional Requirements (Element - Functional Object):

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Last Updated 3/4/2025