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Appendix 3-1

APPENDIX 3-1
PECOS ROAD LOCAL TRAFFIC CIRCULATION
Appendix 3-1, Pecos Road Local Traffic Circulation, presents an evaluation of impacts to local traffic operations
in the Ahwatukee Foothills Village due to the construction and operation of the South Mountain Freeway.

DATE:

February 3, 2006

TO:

Thomas E. Callow
Senior Executive Assistant to the City Manager

FROM:

J. Donald Herp
Deputy Street Transportation Director

SUBJECT:

Pecos Road Local Traffic Circulation

The purpose of this memo is to document the results of an analysis of the use of Pecos Road for
“internal” trips (both origin and destination within Ahwatukee). For the purposes of this analysis, all
“internal” trips are assumed to be diverted to Chandler Boulevard with the construction of SR 202
L (South Mountain Freeway) along the Pecos Road alignment, although a few “internal” trips
would use the freeway.
Pecos Road today is used primarily for trips with either an origin or destination outside of the
Ahwatukee area. To estimate the use of Pecos Road by “internal” trips, traffic counts were made
of the number of vehicles turning eastbound to northbound or southbound to westbound at the
intersections of Pecos Road and 17th Avenue, Desert Foothills Parkway, 24th, 32nd and 40th
Streets. These traffic movements are all assumed to be “internal” trips (both ends of the trip within
the Ahwatukee community).
Manual turning movement counts were made during the morning (6:30 – 8:30) and afternoon (4:30
to 6:30) peak periods at these five intersections. The traffic volumes for the “internal” trips as a
percentage of the total volumes on Pecos Road were calculated.
Using the percentage of “internal” trips found during the peak periods, the total daily “internal” trips
were calculated on each segment of Pecos Road between Chandler Boulevard (26th Avenue
alignment) and 40th Street.
Figure 1 shows the 2006 average weekday traffic volumes on the arterial streets and the
estimated number of “internal” trips on each segment of Pecos Road. These trips are assumed to
divert to Chandler Boulevard if the freeway is built on the Pecos Road alignment.
Figure 2 shows the estimated 2030 average weekday traffic volumes on the arterial streets without
the South Mountain Freeway and the estimated number of “internal” trips on each segment of
Pecos Road if the freeway is not built.
Figure 3 shows the estimated 2030 Average weekday traffic volumes on the arterial streets with
the South Mountain Freeway and the estimated number of “internal” trips on each segment of
Chandler Boulevard diverted from Pecos Road. (Note that this analysis assumes that there is no
interchange at 32nd Street).
While the “internal” trips (as calculated in this analysis) will be diverted to Chandler Boulevard if
the freeway is built along Pecos Road, these trips does not represent a significant percentage of
the total Chandler Boulevard traffic volumes, and, with if the freeway is built on the Pecos Road
alignment, Chandler Boulevard estimated traffic volumes in 2030 are less than if the freeway is not
built.
.

cc: Mr. Blakley, Mr. Johnson

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