Speed Limit and Safety Nexus Studies for Automated
Enforcement Locations in the District of Columbia
Nebraska Avenue at Fessenden Street NW
Study Area and Location
District
PSA
2
201/203
Ward
3
ANC
3F/3G
Phase
Planned
Description
Nebraska Avenue Northeast-Bound at Fessenden
Street Northwest
KEY:
Planned Camera
Proposed Camera
Bus Stop
Metro Station
Hiker/Biker Trail
School
Other Pedestrian Generator
Site 26
The planned speed camera will be located in Ward 3 at the intersection of Nebraska Avenue and Fessenden
Street Northwest in the northeast-bound direction. Nebraska Avenue runs from Oregon Avenue Northwest in
the northeast to Foxhall Road Northwest in the southwest. The posted speed limit is 30 MPH.
W3 - 178
District Department of Transportation
55 M Street, SE, Suite 400
Washington, DC 20003
Nebraska Avenue at Fessenden Street NW
Field Assessment Summary
Nebraska Avenue is assumed to run in the North-South direction and is classified as principal arterial in this
segment of roadway. Nebraska Avenue has two travel lanes in each direction, and Fessenden Street has one
travel lane in each direction at this intersection. This site has the following characteristics:
This site is located in a residential area with houses and driveways on all four legs of the intersection.
There are three schools in the area: Alice Deal Middle School, Murch Elementary School, and Auguste
Montessori School.
There is sidewalk on all sides of the intersection, and on-street parking on the east and west legs of the
intersection.
There is an existing traffic signal and crosswalks with pedestrian signals.
There are multiple bus stops in the area.
Looking North
W3 - 179
District Department of Transportation
55 M Street, SE, Suite 400
Washington, DC 20003
Nebraska Avenue at Fessenden Street NW
Looking South
Speed Data Analysis
Posted Speed Limit (MPH)
30
21
Mean Speed (MPH)
30
85th Percentile Speed (MPH)
10 MPH Pace Speed
22-31
ADT
7,680
The mean speed is 9 MPH lower than the posted speed limit, and the 85th percentile speed is the same as the
posted speed limit at this location.
Crash Data Analysis
From the Accident Summary Report provided for the dates between January 1, 2010 and December 31, 2012,
there were a total of 43 crashes at this location. A breakdown of collision type can be found in the chart on the
next page. The most common type of crashes at this location were Rear End (15 crashes), Right Angle (8
crashes), and Side Swiped (8 crashes). The other collision types had less than four crashes or less.
W3 - 180
District Department of Transportation
55 M Street, SE, Suite 400
Washington, DC 20003
Nebraska Avenue at Fessenden Street NW
Severity
Total
43
Fatal
0
Injury
15
Taxi
10
Truck
9
Weather
0.0%
34.9%
23.3%
20.9%
Clear
Rain
Snow
35
5
1
Surface condition
81.4%
11.6%
2.3%
Dry
Wet
Snow/Ice
35
7
0
Light Condition
81.4%
16.3%
0.0%
Day
Night
23
16
53.5%
37.2%
There were an elevated number of speed-related crashes at this location, including rear end and side swipe
crashes. The AASHTO Highway Safety Manual lists “assuming the lead driver will go through a green or yellow
light, but the lead driver stops” and “changing lanes to avoid a slowing or stopped vehicle”1 as two errors
leading to rear-end and sideswipe crashes. Both of these errors can be decreased with a decrease in travel
speed. There were also a number of injury-related crashes at this location.
Number of Crashes by Collision Type
RearEnd
16
14
10
0
Unspecified
Non-Collision
Backing
Parked
2
Left Turn
4
Side Swipe
6
Right Turn
8
Right Angle
Number of Crashes
12
Collision Type
Safety Nexus
This site presents the following safety considerations which may establish a nexus between the speed camera
and traffic safety:
1. Speed Data – The speed data analysis shows travel speeds being the same as or lower than the posted
speed limit.
1
AASHTO Highway Safety Manual, 1st Edition, 2010; Volume 1, page 2-13
W3 - 181
District Department of Transportation
55 M Street, SE, Suite 400
Washington, DC 20003
Nebraska Avenue at Fessenden Street NW
2. Crash Data – There was an elevated number of speed-related crashes at this location, including rear end
and side swipe collisions. There were also a number of injury-related crashes at this location.
3. Field Assessment – The following site characteristics suggest a need for a safer travel environment:
a. This site is located in a residential area with houses and driveways on all four legs of the
intersection.
b. There are three schools in the area: Alice Deal Middle School, Murch Elementary School, and
Auguste Montessori School.
c. There is on-street parking at this location.
d. There are multiple bus stops in the area which generate pedestrian activity.
Although the speed data analysis showed the 85th percentile speed the same as the posted speed limit, due to
the elevated number of speed-related and injury-related crashes, the specific site characteristics, and the
pedestrian generators, there is a nexus between traffic safety and the speed camera at this location.
W3 - 182
District Department of Transportation
55 M Street, SE, Suite 400
Washington, DC 20003
SAMMAT ENGINEERING SERVICES, LLC
1515 RISING RIDGE ROAD
MOUNT AIRY, MD 21771
www.sammateng.com
Nebraska Avenue NEB at Fessenden Street NW Speed
NEB
Start
Time
11/07/13
01:00
02:00
03:00
04:00
05:00
06:00
07:00
08:00
09:00
10:00
11:00
12 PM
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Total
1
15
*
*
*
*
*
*
*
21
33
28
12
23
18
20
22
199
320
341
229
27
9
20
6
3
1331
16
20
*
*
*
*
*
*
*
31
65
43
28
54
52
28
51
90
122
78
85
41
18
35
18
8
847
21
25
*
*
*
*
*
*
*
134
178
121
76
129
145
127
154
125
84
27
106
119
61
56
34
12
1688
26
30
*
*
*
*
*
*
*
186
221
118
113
123
181
168
210
81
23
2
88
260
203
179
120
58
2334
31
35
*
*
*
*
*
*
*
19
22
26
66
70
50
84
79
42
3
0
14
94
116
97
113
47
942
36
40
*
*
*
*
*
*
*
6
5
8
22
16
12
20
14
1
0
0
4
18
24
9
23
25
207
41
45
*
*
*
*
*
*
*
1
1
1
2
3
1
3
1
0
0
0
0
2
1
1
3
2
22
46
50
*
*
*
*
*
*
*
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
4
51
55
*
*
*
*
*
*
*
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
56
60
*
*
*
*
*
*
*
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
61
65
*
*
*
*
*
*
*
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
66
70
*
*
*
*
*
*
*
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
71
75
*
*
*
*
*
*
*
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
76
999
*
*
*
*
*
*
*
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Total
*
*
*
*
*
*
*
399
525
345
319
418
459
450
531
538
552
448
526
561
432
397
319
157
7376
W3-183
SAMMAT ENGINEERING SERVICES, LLC
1515 RISING RIDGE ROAD
MOUNT AIRY, MD 21771
www.sammateng.com
Nebraska Avenue NEB at Fessenden Street NW Speed
NEB
Start
Time
11/08/13
01:00
02:00
03:00
04:00
05:00
06:00
07:00
08:00
09:00
10:00
11:00
12 PM
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Total
Grand
Total
Stats
1
15
16
20
21
25
6
3
6
2
3
8
25
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
53
1345
857
1741
2
0
1
0
0
4
7
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
14
1
0
0
1
1
4
3
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
10
26
30
18
10
10
7
4
9
50
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
108
31
35
23
10
15
3
3
12
34
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
100
36
40
41
45
46
50
51
55
56
60
61
65
66
70
71
75
76
999
Total
2442
1042
246
30
8
1
0
0
0
0
0
7712
13
6
2
1
1
4
12
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
39
15th Percentile :
50th Percentile :
85th Percentile :
95th Percentile :
8 MPH
22 MPH
30 MPH
34 MPH
Mean Speed(Average) :
10 MPH Pace Speed :
Number in Pace :
Percent in Pace :
Number of Vehicles > 30 MPH :
Percent of Vehicles > 30 MPH :
21 MPH
22-31 MPH
3307
42.9%
1251
16.2%
2
1
1
1
1
0
2
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
8
2
0
0
0
1
0
1
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
4
0
0
0
0
0
0
0
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
0
0
0
0
0
0
0
0
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
0
0
0
0
0
0
0
0
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
0
0
0
0
0
0
0
0
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
0
0
0
0
0
0
0
0
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
0
0
0
0
0
0
0
0
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
0
67
30
35
15
14
41
134
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
336
W3-184
SAMMAT ENGINEERING SERVICES, LLC
1515 RISING RIDGE ROAD
MOUNT AIRY, MD 21771
www.sammateng.com
Nebraska Avenue NEB at Fessenden Street NW Volume
Start
Time
12:00
12:15
12:30
12:45
01:00
01:15
01:30
01:45
02:00
02:15
02:30
02:45
03:00
03:15
03:30
03:45
04:00
04:15
04:30
04:45
05:00
05:15
05:30
05:45
06:00
06:15
06:30
06:45
07:00
07:15
07:30
07:45
08:00
08:15
08:30
08:45
09:00
09:15
09:30
09:45
10:00
10:15
10:30
10:45
11:00
11:15
11:30
11:45
Total
Combined
Total
Peak
Vol.
P.H.F.
ADT
Thu
A.M.
07-Nov-13
P.M.
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
64
88
105
142
141
141
130
113
96
82
81
86
72
85
88
74
98
102
106
112
2006
128
122
95
114
100
122
125
103
119
128
130
154
135
148
131
124
107
138
167
140
120
103
138
87
93
120
166
147
140
153
152
116
138
107
107
80
112
114
88
83
104
74
79
62
53
29
36
39
5370
7376
07:45
554
0.975
06:30
606
0.913
ADT 7,680
Fri
A.M.
08-Nov-13
P.M.
29
17
13
8
10
10
5
5
10
9
9
7
3
4
3
5
3
5
0
6
6
9
14
12
24
22
35
53
0
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
336
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
0
336
06:00
134
0.632
AADT 7,680
Sat
A.M.
09-Nov-13
P.M.
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
0
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
0
0
Daily Average
A.M.
P.M.
29
17
13
8
10
10
5
5
10
9
9
7
3
4
3
5
3
5
0
6
6
9
14
12
24
22
35
53
32
88
105
142
141
141
130
113
96
82
81
86
72
85
88
74
98
102
106
112
2310
128
122
95
114
100
122
125
103
119
128
130
154
135
148
131
124
107
138
167
140
120
103
138
87
93
120
166
147
140
153
152
116
138
107
107
80
112
114
88
83
104
74
79
62
53
29
36
39
5370
7680
07:45
554
0.975
06:30
606
0.913
W3-185
DC Department of Transportation - Traffic Accident Reporting and Analysis System
Accident Summary Report (R-8)
Corridor:
NEBRASKA AVE,NW From CONNECTICUT AVE,NW TO EVERETT ST,NW
Time Period Covered:
From 01/01/2010 To 12/31/2012
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:
Time of Day
43
0
17
0
2
0
1
1
Prepared By: Rahul Jain
Collision Type
Right Angle:
Left Turn:
Right Turn:
Rear End:
Side Swiped:
Head On:
Parked:
#ACC
8
4
2
15
8
0
1
%
18.6%
9.3%
4.7%
34.9%
18.6%
0.0%
2.3%
Prepared Date:
Collision Type
Fixed Object:
Ran Off Road:
Ped. Involved:
Backing:
Non Collision:
Under/Over Ride:
Unspecified:
10/6/2013
#ACC
0
0
0
1
1
0
3
%
0.0%
0.0%
0.0%
2.3%
2.3%
0.0%
7.0%
16:00 ~18:30:
18:30 ~ 07:30:
Unspecified:
#ACC
2
1
5
7
9
19
0
%
4.7%
2.3%
11.6%
16.3%
20.9%
44.2%
0.0%
Day o fweek
Sunday:
Monday:
Tuesday:
Wednesday:
Thursday:
Friday:
Saturday:
#ACC
6
3
6
7
8
8
5
%
14.0%
7.0%
14.0%
16.3%
18.6%
18.6%
11.6%
Weather Condition
Clear:
Rain:
Snow:
Sleet/Hail:
Fog/Mist:
Crosswind/Blowing Sand:
Unspecified:
#ACC
35
5
1
0
1
0
1
%
81.4%
11.6%
2.3%
0.0%
2.3%
0.0%
2.3%
Surface Condition
Dry:
Wet:
Snow/Ice:
Slush:
Water/Sand:
Repairing:
Unspecified:
#ACC
35
7
0
0
0
0
1
%
81.4%
16.3%
0.0%
0.0%
0.0%
0.0%
2.3%
Type of Vehicle
Passenger Car:
Bus:
Truck:
Taxi:
Minivan:
Police/Emergency Vehicle:
Motorcycle/Moped:
Bicycle:
Fixed Object:
Unspecified:
#VEH
58
4
9
10
0
0
1
1
0
5
%
65.9%
4.5%
10.2%
11.4%
0.0%
0.0%
1.1%
1.1%
0.0%
5.7%
Accident Severity Type
Fatal Collision:
Injury Collision:
PDO Collision:
#ACC
0
15
28
%
0.0%
34.9%
65.1%
Light Condition
Daylight:
Dawn/Dusk:
Dark(Lighted):
Dark(Not Lighted):
Dark(Unknown Lighting):
Unspecified:
#ACC
23
1
16
0
0
3
%
53.5%
2.3%
37.2%
0.0%
0.0%
7.0%
Contributing Factor
Driver: Speed:
Driver: Alcohol/Drug:
Driver: Electronic Device:
Driver: Others:
Vehicle:
Roadway:
Unspecified:
#VEH
1
0
0
21
1
1
64
%
1.1%
0.0%
0.0%
23.9%
1.1%
1.1%
72.7%
Pedestrian Actions
In Crosswalk with Signal:
In Crosswalk against Signal:
In Crosswalk no Signal:
In Unmarked Crosswalk:
Not in Crosswalk:
From Between Parked Cars:
Unspecified:
#ACC
0
0
0
0
0
0
0
%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
07:30 ~ 09:30:
09:30 ~ 11:30:
11:30 ~ 13:30:
13:30 ~ 16:00:
21 Records are not approved as of 10/6/2013 1:35:50 PM
W3-186