Pedestrian Signal Safety - AAA Foundation for Traffic Safety

Table C-11. Pedestrian WALK and clearance time durations for case study intersection in Broward
County, Florida.
Approach/
crosswalk
Northbound/
south
Soutbound/
north
Eastbound/
west
Westbound/
east
Length
(ft.)
Clearance time (sec.)
3.00
ft./sec.
3.50
ft./sec.
4.00
ft./sec.
Clearance time with 7sec.
WALK (sec.)
[total WAL K time]
3.00
ft./sec.
3.50
ft./sec.
4.00
ft./sec.
Available
green
(sec.)
75 25 21 19 32˝ 28 26 30
N/A N/A: There is no pedestrian crossing across this leg. 30
TRAFFIC OPERATIONS ANALYSIS
68 23 19 17 30 26 24 30
48 16 14 12 23 21 19 30
Table C-12 shows the intersection operational and geometric characteristics for the Broward County
case study intersection. Figure C-2 shows the overall average vehicle delay (AVD) and intersection
level of service (LOS) under various peak-hour traffic volume and pedestrian walking speed scenarios
(3.00, 3.50, 4.00 ft./sec. and base conditions).
Figures C-3, C-4, and C-5 show the major street and minor street approach AVD (in sec.) under
walking speeds of 3.00 ft./sec., 3.50 ft./sec., and 4.00 ft./sec., respectively. Table C-13 shows the
overall, major street approach, and minor street approach intersection LOS and AVD (in sec.) under
various peak-hour traffic volume scenarios and under pedestrian walking speeds of 3.00 ft./sec., 3.50
ft./sec., and 4.00 ft./sec.
For the overall intersection, there was no change in LOS (LOS C remained the same) and a minor
increase of 2 to 3 sec. in terms of average delay per vehicle (ADPV) when comparing existing volume
conditions to a modeled increase of 15 percent above existing volumes. From a practical standpoint,
this would not be noticeable to the average driver. Because the LOS was relatively good (LOS C) in
the base condition, the trends in LOS and ADPV showed a uniform and relatively small incremental
delay for each of the walking speeds simulated.
For the major street approach, there was no change in LOS (LOS C remained the same) for any of
the volume and pedestrian walking speed scenarios analyzed. The range in ADPV under existing
volume conditions as compared to a modeled increase of 15 percent above existing volumes for
the 3.00 ft./sec. walking speed assumption was 22 to 25 sec. For the 3.50 ft./sec. and 4.00 ft./sec.
pedestrian walking speed scenarios, the range in average delay on the major street approach was 23
to 24 sec. and 21 to 23 sec., respectively.
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