Speed Limit and Safety Nexus Studies for Automated Enforcement Locations in the District of Columbia DC Miles South of Pennsylvania Avenue SE

Transcription

1 Speed Limit and Safety Nexus Studies for Automated Enforcement Locations in the District of Columbia DC Miles South of Pennsylvania Avenue SE Study Area and Location District PSA Ward ANC Phase Description A Proposed DC Miles South of Pennsylvania Avenue Southeast, Southwest-bound Anacostia Park Anacostia Park Site 268 KEY: Existing Camera Proposed Camera Bus Stop Metro Station Hiker/Biker Trail School Other Pedestrian Generator This proposed speed camera is located in Ward 7 on DC 295 Southeast.4 miles south of Pennsylvania Avenue Southeast in the southwest-bound direction. DC 295 runs between the Baltimore-Washington Parkway to the north and I-295 to the south. The posted speed limit is 5 MPH. W7-472 District Department of Transportation 55 M Street, SE, Suite 4 Washington, DC 23

2 DC Miles South of Pennsylvania Avenue SE Field Assessment Summary DC 295 is assumed to run in the northeast-southwest direction, and is classified as a freeway. DC 295 has three travel lanes southwest-bound and four travel lanes northeast-bound. This site has the following characteristics: The Anacostia Park is located to the north of the site and has bike trails that generate pedestrian activity off of the freeway. There is a median with concrete barriers dividing the northeast-bound and southwest-bound traffic. The pavement is in good condition and the concrete barriers have inlets for drainage. There is a 15-feet deceleration lane leading to the 11 th Street Bridge on this segment. Looking Northeast-bound W7-473 District Department of Transportation 55 M Street, SE, Suite 4 Washington, DC 23

3 DC Miles South of Pennsylvania Avenue SE Looking Southwest-bound Speed Data Analysis SW Posted Speed Limit (MPH) 5 Mean Speed (MPH) 41 85th Percentile Speed (MPH) 61 1 MPH Pace Speed ADT 28,675 The mean speed is lower than the posted speed limit, and the 85th percentile speed is higher than the posted speed limit at this location. 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 21 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 Rear End (12 crashes). Furthermore, this site experienced six injury-related crashes. W7-474 District Department of Transportation 55 M Street, SE, Suite 4 Washington, DC 23

4 DC Miles South of Pennsylvania Avenue SE Severity Weather Surface condition Light Condition Total 21 Fatal Clear % Dry % Day % Injury % Rain 1 Wet 1 Night % Truck % Snow Snow/Ice Taxi 2 14 Number of Crashes by Collision Type 12 Rear End 1 Number of Crashes Side Swipe 2 Fixed Object Collision Type Non-Collision Safety Nexus This site presents the following safety considerations which may establish a safety nexus between the speed camera and safety. 1. Speed Data The 85 th percentile speed is much higher than the posted speed limit at this location. 2. Crash Data This site experienced six injury-related crashes. 3. Field Assessment The following site characteristics suggest a need for a safer travel environment: a. Anacostia Park is close to the site and has bike trails that generate pedestrian activity off of the freeway. b. There is a 15-feet deceleration lane leading to the 11th Street Bridge on this segment. W7-475 District Department of Transportation 55 M Street, SE, Suite 4 Washington, DC 23

5 DC Miles South of Pennsylvania Avenue SE Large volumes of traffic execute weaving and merging operations in this segment of freeway to access the 11 th Street Bridge. However, this operation occurs on a short deceleration lane, 15 feet, between the Pennsylvania Avenue Interchange and the 11 th Street Bridge Interchange. It is desired to have slower speeds in this section of the freeway so vehicles can execute safer weaves and merges and thus minimize potential freeway vehicle-to-vehicle conflicts. For this reason, along with the elevated 85 th percentile speeds and the number of injury-related crashes at this location, there is a nexus between traffic safety and the speed camera at this location. W7-476 District Department of Transportation 55 M Street, SE, Suite 4 Washington, DC 23

6 DC295.4 MILE S/O PA Avenue SE SWB Speed SAMMAT ENGINEERING SERVICES, LLC 1515 RISING RIDGE ROAD MOUNT AIRY, MD SWB Start Time Total 12/2/13 * * * * * * * * * * * * * * * 1: * * * * * * * * * * * * * * * 2: * * * * * * * * * * * * * * * 3: : : : : : : : : PM : : : : : : : : : : : Total W7-477

7 DC295.4 MILE S/O PA Avenue SE SWB Speed SAMMAT ENGINEERING SERVICES, LLC 1515 RISING RIDGE ROAD MOUNT AIRY, MD SWB Start Time Total 12/3/ : : : : * * * * * * * * * * * * * * * 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 : 7 MPH 51 MPH 61 MPH 66 MPH Stats Mean Speed(Average) : 41 MPH 1 MPH Pace Speed : MPH Number in Pace : 9984 Percent in Pace : 35.2% Number of Vehicles > 5 MPH : 1865 Percent of Vehicles > 5 MPH : 65.7% W7-478

8 DC295.4 MILE S/O PA Avenue SE SWB Volume SAMMAT ENGINEERING SERVICES, LLC 1515 RISING RIDGE ROAD MOUNT AIRY, MD Start Mon 2-Dec-1 Tue 3-Dec-1 Wed 4-Dec-1 Daily Average Time A.M. P.M. A.M. P.M. A.M. P.M. A.M. P.M. 12: * * * * :15 * * * * :3 * * * * :45 * * * * : * * * * :15 * * * * :3 * * * * :45 * * * * : * * * * :15 * * * * :3 * * * * :45 * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * : * * * * Total Combined Total Peak 5:15 :15-12: :15 :15 Vol P.H.F ADT ADT 28,675 AADT 28,675 W7-479

9 DC Department of Transportation - Traffic Accident Reporting and Analysis System Accident Summary Report (R-8) Corridor: INTERSTATE 295,BN From PENNSYLVANIA AVE,SE TO MARTIN LUTHER KING JR AVE,SE Time Period Covered: From 1/1/21 To 12/31/212 Prepared By: Rahul Jain Prepared Date: 1/9/214 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: Right Turn: Ped. Involved: Rear End: % Backing: Side Swiped: % Non Collision: 1 Head On: Under/Over Ride: Parked: Unspecified: Time of Day #ACC % 7:3 ~ 9:3: 4 19.% 9:3 ~ 11:3: 1 11:3 ~ 13:3: 2 13:3 ~ 16:: % 16: ~18:3: 4 19.% 18:3 ~ 7:3: % Unspecified: Day o fweek #ACC % Sunday: Monday: 2 Tuesday: % Wednesday: 2 Thursday: % Friday: % Saturday: 1 Weather Condition #ACC % Clear: % Rain: 1 Snow: Sleet/Hail: Fog/Mist: Crosswind/Blowing Sand: Unspecified: Surface Condition #ACC % Dry: % Wet: 1 Snow/Ice: Slush: 1 Water/Sand: Repairing: Unspecified: 1 Type of Vehicle #VEH % Passenger Car: % Bus: 1 2.7% Truck: 3 8.1% Taxi: 2 5.4% Minivan: Police/Emergency Vehicle: Motorcycle/Moped: Bicycle: Fixed Object: Unspecified: 4 1.8% Accident Severity Type #ACC % Fatal Collision: Injury Collision: % PDO Collision: % Light Condition #ACC % Daylight: % Dawn/Dusk: 2 Dark(Lighted): % Dark(Not Lighted): Dark(Unknown Lighting): Unspecified: 2 Contributing Factor #VEH % Driver: Speed: 1 2.7% Driver: Alcohol/Drug: 1 2.7% Driver: Electronic Device: Driver: Others: 4 1.8% Vehicle: 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: 11 Records are not approved as of 1/9/214 6:31:8 PM W7-48