Traffic Issues on 27th Street North

Neighborhood Traffic Calming Team Response to Citizen Request for Traffic Calming

August 6, 2001

Dear Citizen:

This is in response to your previous request for traffic calming measures for 27th Street North between North Ohio Street and John Marshall Drive in the Williamsburg Civic Association. The Neighborhood Traffic Calming Team of the Arlington Department of Public Works has completed its evaluation regarding speeding concerns.

Based on the information, staff investigated records, conducted field site visits and collected speed data on 27th Street North. We found the average speeds on 27th Street North were measured at 28 mph with a traffic volume of 936 vehicles per day. Further analysis indicated that the 85th percentile speed was measured at 35 mph, meaning that most (85 percent) motorists travel at 35 mph or below, and 15 percent travel at a higher speed. An 85th percentile speed of 35 mph exceeds the 30 mph adopted threshold that defines a speeding problem as outlined in the Neighborhood Traffic Calming Program. Locations meeting traffic calming thresholds are further graded for various factors. Points are given for volume, speed, accidents, bus/bike route, pedestrian generators (i.e. schools, parks, library etc.), and the existence of sidewalks. The points are totaled for a ranking score. All requests are then prioritized based on the total points accumulated. The ranking score for 27th Street North between North Ohio Street and John Marshall Drive is 54. A ranking score of 54 is mid range compared to other locations where we have collected data. We will report these results to the NTCC for prioritization. Once 27th Street North is selected by the NTCC and staff as a project street to receive traffic calming assistance, you will be notified.

In the meantime, if you would like for us to deploy the Speed Display Trailer, which displays the speeds and alerts drivers of their speeds please call me at (703) 228-3735 to schedule an appointment.

It has been a pleasure to review this matter for you. Should you have any further questions, please call me.

Sincerely,

Susan Finotti
Neighborhood Traffic Calming Team

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