Final Report - Pima Association of Governments

High Capacity Transit System Plan - Final Report June 2009
Future Conditions
3.3 TRANSPORTATION SYSTEM
Traffic Volumes and Level of Service
Figure 20 illustrates the roadway network volume‐to‐capacity ratios in 2040. The most heavily
congested corridor in the study area is expected to continue to be the I‐10 corridor. Most
segments of I‐10 are expected to exceed capacity by 2040. A large portion of I‐19 is also expected
to exceed capacity by 2040.
Major congestion is expected in the vicinity of TIA (especially on Old Vail Connection Road),
Broadway Boulevard, Speedway Boulevard, and Grand Road, which are expected to have more
segments exceeding capacity. River Road and Oracle Road are expected to see an increase in the
number of segments that exceed capacity. Road segments throughout downtown Tucson are
expected to see an increase in over‐capacity conditions. Valencia Road is projected to have a
reduction in congestion west of I‐19, as this segment will no longer exceed capacity likely due to
planned improvements. However, heavy congestion is projected to occur on Valencia Road east
of I‐19 in 2040.
Planned and Programmed Improvements
Figure 21 and Figure 22 show the transit and roadway improvements identified in the 20‐year
plan prepared by the Tucson Regional Transportation Authority (RTA) and approved by voters
in 2006.
Identified transit improvements include:
• New express bus routes serving Sahuarita/Green Valley, Ajo, Marana, and Oro Valley,
and enhancements to existing express bus routes.
• Development of modern streetcar line connecting Rio Nuevo with U of A.
• New park‐n‐rides serving Rita Ranch, West Valencia Road, East Broadway Boulevard,
Marana, Oro Valley, and Green Valley.
• New transit circulators in Marana, Oro Valley/Catalina, and Sahuarita/Green Valley.
Roadway capacity improvements are planned along several arterial roadways including
Houghton Road, Tangerine Road, Valencia Road, Grant Road, Silverbell Road, North Oracle
Road, and La Cholla Boulevard, which are targeted for widening.
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