Pedestrian Signal Safety - AAA Foundation for Traffic Safety

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The minimum green time available for the major approach, 30 sec., was adequate time for a PCI for
the crosswalk on the southern leg of the intersection based on 4.00 ft./sec. and 3.50 ft./sec. assumed
walking speeds. For a 3.00 ft./sec. pedestrian walking speed, a minimum green time of 32 sec. was
required for the parallel street phase. Even after the signal timings were adjusted based on the 3.00
ft./sec. pedestrian walking speed, because of the lower volumes at the intersection, the delays on the
major and minor street did not increase noticeably.
For the minor street approach, LOS ranged from LOS B to C for each 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 was 19 to 22 sec. for the 3.00
ft./sec. walking speed assumption. For the 3.50 ft./sec. and 4.00 ft./sec. pedestrian walking speed
scenarios, the range in average delay on the minor street approaches was 19 to 20 sec. and 20 to 23
sec., respectively.
Table C-12. Broward County, Florida intersection characteristics: approach lane usage, peak-hour
traffic volumes, and cycle length.
Approach
Northbound
(MJ)
Southbound
(MJ)
Eastbound
(MN)
Westbound
(MN)
MJ
approach
MN
approach
Number of approa ch lanes
L LT T TR R Total
-10
percent
Existing
Peak-hour tra ffic vol umes
(existing and modeled)
+5 +10 +15
percent percent percent
2 0 2 0 0 4 698 776 815 854 892
1 0 2 0 1 4 955 1,061 1,114 1,167 1,220
1 1 0 0 1 3 538 598 628 658 688
0 1 0 0 1 2 36 40 42 44 46
3 0 4 0 1 8 1,653 1,857 1,929 2,042 2,112
Vol ume
range
698
1,653 –
2,112
1 2 0 0 2 5 574 638 670 702 734 574 –734
Total 4 2 4 0 3 13 2,227 2,475 2,599 2,723 2,846
Cycl e len gth: 110 sec.
* Note: L = left; LT = left-through; T = through; TR = through-right; R = right.
2,227 –
2,846