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58
Table 31. Pedestrian delay by treatment.
Initial Delay (s) Median Delay (s) Total Delay (s)
Treatment Count
Avg StdDev Avg StdDev Avg StdDev
Flag 2.67 3.37 0.10 0.37 2.72 3.39 350
Half 16.88 19.78 0.69 3.04 17.06 19.70 342
Hawk 7.80 7.86 1.83 6.21 9.63 9.60 224
HiVi 1.86 4.08 0.53 2.35 2.39 4.88 606
InSt 2.09 3.67 0.09 0.86 2.15 3.78 310
Msig 26.35 27.67 0.00 0.00 26.35 27.67 393
OfPa 5.54 9.47 0.10 1.12 5.62 9.59 164
OfPb 5.44 6.61 -- -- 5.44 6.61 254
Refu 5.36 10.20 3.86 11.47 9.22 16.21 512
Grand
8.12 15.46 1.36 6.41 9.01 16.29 3155
Total
about 60 percent of crossing pedestrians, while active yellow Only one conflict was observed in the 3,155 crossings eval-
devices were activated 28 percent of the time. Also, about uated in this study. That conflict had a car maneuver onto the
one-half of the pedestrians at a refuge island had no wait, curb to avoid another car that was stopping for a crossing
while 85 to 90 percent of pedestrians at other enhanced pedestrian.
treatments had no wait.
Of the 67 OfPa pedestrians who had no activation, 27 were
Pedestrian Delay
at a site where the detector was malfunctioning, 24 were not
detected by the system, and 16 were not compliant in using Two types of pedestrian delay were extracted from the
the crosswalk. videotapes by recording the difference in time between two
events, as follows:
Pedestrian-Vehicle Conflicts
· For initial delay, the difference in time between points A
A pedestrian-vehicle conflict was counted if either a pedes- and B in Figure 21, recorded as the variable initial delay;
trian or a vehicle acted to avoid a pedestrian-vehicle collision. and
Evasive actions by the pedestrian included rushing to com- · For median delay, the difference in time between points C
plete a crossing or aborting a started crossing. Evasive actions and D in Figure 21, recorded as the variable median delay.
by the vehicle included sudden swerving, lane changing, or
braking. Each pedestrian-vehicle conflict was coded into one Table 31 summarizes the initial, median, and total pedes-
of the categories shown in Figure 20. In addition the follow- trian delay by treatment. Initial pedestrian delay is highest at
ing location for the conflict was recorded: sites with red treatments, followed by beacons (passive and
active) and refuge islands. Sites with flags, high-visibility
1. Conflict with the first direction of main street vehicle traffic, markings, and in-street signs all had an average initial pedes-
2. Conflict with the second direction of main street vehicle trian delay lower than 3 seconds. Median pedestrian delay for
traffic, all sites was very low, except for those with refuge islands. Sites
3. Conflict with left-turning side street vehicle traffic, or with HAWK signals were the only other sites to have an aver-
4. Conflict with right-turning side street vehicle traffic. age median pedestrian delay higher than 1 second.
