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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 provision VDOT NOVA District MPSTOC - TOC/ATMS VDOT NOVA District VSL Data Lake Planned
data publication VDOT NOVA District VSL Data Lake Private Sector ISP Centers Planned
data publication VDOT NOVA District VSL Data Lake VDOT NOVA District MPSTOC - TOC/ATMS Planned
data publication VDOT NOVA District VSL Data Lake VSP Center - MPSTOC Planned
data query Private Sector ISP Centers VDOT NOVA District VSL Data Lake Planned
data query VDOT NOVA District MPSTOC - TOC/ATMS VDOT NOVA District VSL Data Lake Planned
data query VSP Center - MPSTOC VDOT NOVA District VSL Data Lake Planned
data query publication VDOT NOVA District VSL Data Lake Private Sector ISP Centers Planned
data query publication VDOT NOVA District VSL Data Lake VDOT NOVA District MPSTOC - TOC/ATMS Planned
data query publication VDOT NOVA District VSL Data Lake VSP Center - MPSTOC Planned
data subscription Private Sector ISP Centers VDOT NOVA District VSL Data Lake Planned
data subscription VDOT NOVA District MPSTOC - TOC/ATMS VDOT NOVA District VSL Data Lake Planned
data subscription VSP Center - MPSTOC VDOT NOVA District VSL Data Lake Planned
environmental conditions data status National Weather Service VDOT NOVA District MPSTOC - TOC/ATMS Planned
qualified environmental conditions data National Weather Service VDOT NOVA District MPSTOC - TOC/ATMS Planned
variable speed limit control VDOT NOVA District MPSTOC - TOC/ATMS VDOT NOVA District VSL Signs Planned
variable speed limit control VDOT NOVA District MPSTOC - TOC/ATMS VDOT NOVA District VSL Static Signs Planned
variable speed limit status VDOT NOVA District VSL Signs VDOT NOVA District MPSTOC - TOC/ATMS Planned
variable speed limit status VDOT NOVA District VSL Static Signs VDOT NOVA District MPSTOC - TOC/ATMS Planned


Project Functional Requirements (Element - Functional Object):

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Last Updated 2/26/2025