Speed Limit and Safety Nexus Studies for Automated Enforcement Locations in the District of Columbia East Capitol Street at Southern Avenue NE

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1 Speed Limit and Safety Nexus Studies for Automated Enforcement Locations in the District of Columbia East Capitol Street at Southern Avenue NE Study Area and Location District PSA Ward ANC Phase Description 6 64/68 7 7C/7E Planned East Capitol Street Westbound at Southern Avenue Northeast Recreation Center Site 114 KEY: Planned Camera Proposed Camera Bus Stop Metro Station Hiker/Biker Trail School Other Pedestrian Generator This planned speed camera will be located in Ward 7 at the intersection of East Capitol Street and Southern Avenue Northeast in the westbound direction. East Capitol Street runs between Southern Avenue Southeast to the east and C Street Northeast to the west. The posted speed limit is 3 MPH. W7-328 District Department of Transportation 55 M Street, SE, Suite 4 Washington, DC 23

2 East Capitol Street at Southern Avenue NE Field Assessment Summary East Capitol Street is assumed to run in an east-west direction, and is classified as a principal arterial. East Capitol Street has two through lanes, a through and right lane, and a left turn lane eastbound, as well as two through lanes, a through and left lane, and a right turn lane westbound. Southern Avenue Northeast has one through and right lane and one through and left lane in each direction. This site has the following characteristics: This is a residential area with apartments and houses. There is roadwork in the northwest corner. The Capitol Heights Metro Station is in the southeast corner of the intersection. There is sidewalk on both sides of all four legs of the intersection. There are islands in the northeast corner, the southwest corner, and the middle of the west leg. There are concrete medians on all four legs. There is a break in the median on the south leg at the entrance to the metro station. The intersection has a traffic signal with pedestrian signals and crosswalks on all four legs. There is a slope downgrade northbound on the south leg. There are bus stops westbound on the west leg and east bound on the east leg. There is a bus bay for the bus stop on the east leg. Looking Eastbound W7-329 District Department of Transportation 55 M Street, SE, Suite 4 Washington, DC 23

3 East Capitol Street at Southern Avenue NE Looking Westbound Speed Data Analysis Posted Speed Limit (MPH) 3 Mean Speed (MPH) 3 85th Percentile Speed (MPH) 39 1 MPH Pace Speed (MPH) ADT 8,399 The mean speed is equal to the posted speed limit and the 85 th percentile speed is 9 MPH higher than the posted speed limit. Crash Data Analysis From the Accident Summary Report provided for the dates between January 1, 21 and December 31, 212, there were a total of 52 crashes at this location. A breakdown of number of crashes by collision type can be found in the chart on the next page. The most common types of crashes at this location were Right Angle (15 crashes), Left Turn (11 crashes), Rear End (7 crashes) and Fixed Object (7 crashes). Furthermore, this site experienced high frequency (24 crashes) of injury-related crashes. W7-33 District Department of Transportation 55 M Street, SE, Suite 4 Washington, DC 23

4 East Capitol Street at Southern Avenue NE Severity Weather Surface condition Light Condition Total 52 Fatal Clear % Dry % Day % Injury % Rain % Wet % Night % Bus 3 5.8% Snow 2 3.8% Snow/Ice 1 1.9% Truck 2 3.8% 16 Number of Crashes by Collision Type Right Angle Number of Crashes Left Turn Right Turn Rear End Side Swipe Head On Parked Fixed Object Ran Off Road Pedestrian Unspecified Collision Type The Southern Avenue Corridor is listed as one of the Top 1 high frequency crash corridors from 29 to 211, according to the Traffic Safety Statistics Report for the District of Columbia (29-211). 1 Safety Nexus This site presents the following safety considerations which may establish a nexus between traffic safety and the speed camera: 1. Speed Data The 85 th percentile speed is much higher than the posted speed limit at this location. 2. Crash Data There was an elevated number of speed-related crashes at this location, including right angle collisions, as well as a high frequency (24 crashes) of injury-related crashes. The Southern Avenue Corridor is listed as one of the Top 1 high frequency crash corridors from 29 to Field Assessment The following site characteristics suggest a need for a safer travel environment: 1 DDOT, Traffic Safety Statistics Report for the District of Columbia (29-211), page 8. W7-331 District Department of Transportation 55 M Street, SE, Suite 4 Washington, DC 23

5 East Capitol Street at Southern Avenue NE a. This is a residential area with apartments and houses and roadwork in the northwest corner. b. There are several bus stops and one Metrorail station in the area which generate pedestrian activity. Due to the speed data analysis, the elevated number of speed-related crashes and injury-related crashes, the site characteristics, and pedestrian generators, there is a nexus between traffic safety and the speed camera at this location. W7-332 District Department of Transportation 55 M Street, SE, Suite 4 Washington, DC 23

6 East Capitol St WB at Southern Ave NE Speed SAMMAT ENGINEERING SERVICES, LLC 1515 RISING RIDGE ROAD MOUNT AIRY, MD WB Start Time Total 11/2/13 * * * * * * * * * * * * * * * 1: * * * * * * * * * * * * * * * 2: * * * * * * * * * * * * * * * 3: : : : : : : : : PM : : : : : : : : : : : Total W7-333

7 East Capitol St WB at Southern Ave NE Speed SAMMAT ENGINEERING SERVICES, LLC 1515 RISING RIDGE ROAD MOUNT AIRY, MD WB Start Time Total 11/21/ : : : : 5: * * * * * * * * * * * * * * * 6: * * * * * * * * * * * * * * * 7: * * * * * * * * * * * * * * * 8: * * * * * * * * * * * * * * * 9: * * * * * * * * * * * * * * * 1: * * * * * * * * * * * * * * * 11: * * * * * * * * * * * * * * * 12 PM * * * * * * * * * * * * * * * 13: * * * * * * * * * * * * * * * 14: * * * * * * * * * * * * * * * 15: * * * * * * * * * * * * * * * 16: * * * * * * * * * * * * * * * 17: * * * * * * * * * * * * * * * 18: * * * * * * * * * * * * * * * 19: * * * * * * * * * * * * * * * 2: * * * * * * * * * * * * * * * 21: * * * * * * * * * * * * * * * 22: * * * * * * * * * * * * * * * 23: * * * * * * * * * * * * * * * Total Grand Total th Percentile : 5th Percentile : 85th Percentile : 95th Percentile : 13 MPH 31 MPH 39 MPH 45 MPH Stats Mean Speed(Average) : 3 MPH 1 MPH Pace Speed : MPH Number in Pace : 3914 Percent in Pace : 46.6% Number of Vehicles > 3 MPH : 4838 Percent of Vehicles > 3 MPH : 57.6% W7-334

8 East Capitol St WB at Southern Ave NE Volume SAMMAT ENGINEERING SERVICES, LLC 1515 RISING RIDGE ROAD MOUNT AIRY, MD Start Wed 2-Nov-13 Thu 21-Nov-13 Fri 22-Nov-13 Daily Average Time A.M. P.M. A.M. P.M. A.M. P.M. A.M. P.M. 12: * * * * :15 * 1 19 * * * :3 * * * * :45 * * * * : * 12 1 * * * :15 * * * * :3 * * * * :45 * * * * : * 78 2 * * * :15 * 1 6 * * * 6 1 2:3 * 81 5 * * * :45 * * * * : * * * * :15 * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * Total Combined Total Peak 6:3 1: 12: 6:3 1: Vol P.H.F ADT ADT 8,399 AADT 8,399 W7-335

9 DC Department of Transportation - Traffic Accident Reporting and Analysis System Accident Summary Report (R-8) Corridor: EAST CAPITOL ST,BN From SOUTHERN AVE,BN TO FIFTY EIGHTH ST,BN Time Period Covered: From 1/1/21 To 12/31/212 Prepared By: Rahul Jain Prepared Date: 1/6/213 Total Number of Accident: Total Number of Fatalities: Total Number of Injuries: Total Number of Disabling Injuries: Total Number of NonDisabling Injuries: Total Number of Pedestrians Involved: Total Number of Bicycles Involved: Total Number of Motorcycles Involved: Collision Type #ACC % Collision Type #ACC % Right Angle: % Fixed Object: % Left Turn: % Ran Off Road: 1 1.9% Right Turn: 1 1.9% Ped. Involved: 2 3.8% Rear End: % Backing: Side Swiped: 4 7.7% Non Collision: Head On: 2 3.8% Under/Over Ride: Parked: 1 1.9% Unspecified: 1 1.9% Time of Day #ACC % 7:3 ~ 9:3: 3 5.8% 9:3 ~ 11:3: 3 5.8% 11:3 ~ 13:3: 3 5.8% 13:3 ~ 16:: % 16: ~18:3: % 18:3 ~ 7:3: % Unspecified: Day o fweek #ACC % Sunday: 5 9.6% Monday: 5 9.6% Tuesday: % Wednesday: % Thursday: % Friday: % Saturday: % Weather Condition #ACC % Clear: % Rain: % Snow: 2 3.8% Sleet/Hail: Fog/Mist: 1 1.9% Crosswind/Blowing Sand: Unspecified: 2 3.8% Surface Condition #ACC % Dry: % Wet: % Snow/Ice: 1 1.9% Slush: 1 1.9% Water/Sand: Repairing: Unspecified: Type of Vehicle #VEH % Passenger Car: % Bus: 3 3.2% Truck: 2 2.1% Taxi: 1 1.1% Minivan: Police/Emergency Vehicle: 2 2.1% Motorcycle/Moped: Bicycle: Fixed Object: Unspecified: 3 3.2% Accident Severity Type #ACC % Fatal Collision: Injury Collision: % PDO Collision: % Light Condition #ACC % Daylight: % Dawn/Dusk: 5 9.6% Dark(Lighted): % Dark(Not Lighted): Dark(Unknown Lighting): Unspecified: Contributing Factor #VEH % Driver: Speed: 1 1.1% Driver: Alcohol/Drug: 2 2.1% Driver: Electronic Device: Driver: Others: % Vehicle: 1 1.1% Roadway: Unspecified: % Pedestrian Actions #ACC % In Crosswalk with Signal: In Crosswalk against Signal: In Crosswalk no Signal: In Unmarked Crosswalk: Not in Crosswalk: From Between Parked Cars: Unspecified: Records are not approved as of 1/6/213 7:43:13 PM W7-336