N. Park Drive & N. George Mason Drive Intersection Improvements


In Design

In October 2023, staff began preliminary design efforts on the project. Preliminary design will conclude by the end of 2023, with detailed design finalized by late spring 2024. Construction will begin in Summer 2024 and be completed by the end of 2024.

An interim safety intervention is anticipated before the end of 2023 - more information will be posted here when it is available.

About the Project

This project will deliver pedestrian and vehicle safety improvements including the installation of new 4-way traffic signal, curb extensions on all corners of the intersection, increased street lighting where necessary and marked crosswalks for all crossings at the intersection. It has been expedited from its original timeline as shown in the FY2023-2032 Capital Improvement Program to address recurring patterns of dangerous vehicle crashes at the intersection.

Project Goals

  • Eliminate the conditions that are contributing to a pattern of vehicle-vehicle angle crashes at this intersection
  • Improve safety for all modes next to an elementary school and a major community facility
  • Deliver the project on an expedited timeline

Project Background

The intersection of  N. Park Drive and N. George Mason Drive adjacent to the Lubber Run Community Center currently presents significant safety concerns to motorists, cyclists and pedestrians passing through the area. This intersection has experienced a significant increase in usage since the opening of the Lubber Run Community Center in Summer of 2021. These changes appear to have contributed to a history of vehicle-to-vehicle angle crashes resulting from vehicles turning left or going through on N Park Dr. from the stop signs. Four of these crashes resulted in personal injury between 2021-2022, which prompted the capital project to install the traffic signal to provide more organized and predictable traffic patterns at the intersection.

Project Basis

Vision Zero

  • Vision Zero policies calls on County staff and the Arlington community to take a holistic approach to safety in order to eliminate severe and fatal crashes from our transportation network by 2030.


2017 Lubber Run Community Center Site Plan

  • The site plan process included a traffic study that anticipated traffic pattern changes at the intersection of N. Park Road and N. George Mason Drive as a result of the new Lubber Run facility.
  • Recommended additional safety measures up to and including full signalization of the intersection.
  • Rectangular Rapid Flashing Beacon (RRFB) and pedestrian refuge were installed, and DES Transportation conducted a signal analysis after the LRCC was completed to further analyze if full signalization was appropriate once new travel patterns established themselves.


2022 DES Transportation Signal Warrant Study

  • In 2022 DES Transportation’s Signals group recommended signalization of the intersection because it met the following Federal warrants for signalization as described in the Manual for Uniform Traffic Control Devices (MUTCD):
    • Proximity to school crossing
    • Pedestrian volumes
    • Crash History
    • Vehicle Volumes and Speeds



About the Process

Click to explore the details of the project process here.

Fall 2023 - Project Acceleration & Community Update

Due to the safety concerns associated with the intersection, County staff are expediting the timeline for implementing improvements where possible. An update about what this entails, and the current status of the project was presented to the Arlington Forest Civic Association on November 15, 2023.

View the Presentation(PDF, 1MB)


Winter 2023/2024 - Interim Safety Intervention

To prevent additional crashes at this intersection while we progress the design and construction of the traffic signal, the project team worked with the Vision Zero Quick Build program to design and implement an interim safety intervention at the project intersection.It will be installed in December 2023.

This installation temporarily closes the left turn and through movements from N Park St at N George Mason Dr using signage, flexible posts/bollards, and wheel stops. Left turns will continue to be permitted from N George Mason Dr. to access northbound or southbound N Park St. This action was prioritized due to the proximity to adjacent Community and School facilities, and maintains necessary emergency access at the intersection. The interim conditions will be removed in conjunction with the capital safety project. 


This project is funded through the FY2023-2032 Capital Improvement Program using money from the County's Transportation Capital Fund. Interim interventions will be funded through general funds or the Street Safety Improvements program