Pedestrian Signal Safety - AAA Foundation for Traffic Safety

Minneapolis/St.Paul, Minnesota
Figure 9 and Table 17 show the total intersection LOS and ADPV for the Minneapolis/St. Paul,
Minnesota case study intersection under various peak-hour traffic volume and pedestrian walking
speed scenarios. Table D-10 in Appendix D shows the intersection operational and geometric
characteristics for the Minneapolis/St. Paul case study intersection.
When existing volume conditions were compared to a modeled increase of 10 percent above
existing volume conditions, there was a decrease of one LOS designation (from LOS C to D) with
a corresponding increase in ADPV of 14 sec. under the 3.00 ft./sec. walking speed scenario. An
incremental increase of another 5 percent of peak-hour volume to the 3.00 ft./sec. walking speed
lowered the LOS from D to E and added 7 sec. to the ADPV. Thus, from existing volume conditions
to a modeled increase of 15 percent over existing volumes, there was a reduction of two LOS
designations (from LOS C to E) and a corresponding increase of approximately 21 sec. for the ADPV.
Under the 3.50 ft./sec. and 4.00 ft./sec. walking speed scenarios, under existing volumes to an
increase of 15 percent above existing volumes, there was no change in LOS (LOS C remained the
same); however, there was a corresponding increase in ADPV of approximately 5 sec. and 4 sec.
under the 3.50 ft./sec. and 4.00 ft./sec. walking speed scenarios, respectively.
In summary, the 3.00 ft./sec. pedestrian walking speed, compared to the 3.50 ft./sec. and 4.00 ft./sec.
pedestrian walking speeds, had a greater negative impact on vehicular traffic operations at the case
study intersection.
A discussion of LOS and AVD for the major and minor approaches is included in Appendix D to this
report. Table D-11 and Figures D-5, D-6, and D-7 in Appendix D show intersection delay for major and
minor street approaches at walking speeds of 3.00, 3.50, and 4.00 ft./sec. at the Minneapolis/St. Paul
case study intersection.
Figure 9. Delay vs. volumes at Minneapolis/St. Paul, Minnesota case study intersection for walking
speeds of 3.00, 3.50, 4.00 ft./sec. and base conditions.
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