sr 77/oracle road multimodal corridor profile study final report - Pima ...

8. OPPORTUNITIES AND CONSTRAINTS
This chapter identifies financial, right of way, and environmental opportunities and constraints
that may impact the development of transportation improvements.
8.1 FINANCIAL OPPORTUNITIES AND CONSTRAINTS
Based on information from the Pima Association of Governments 2025 Regional Transportation
Plan Amendment (Adopted January, 2004) current revenue sources for the Regional
Transportation Plan consist of Federal, State, and local highway funds, which include: State
vehicle license tax, revenues from the State transportation taxes distributed to the jurisdictions
and the Metropolitan Planning Organization, lottery revenues, development impact fees,
construction sales tax, fare box proceeds, and general fund contributions. Most revenue sources
are restricted in how they can be used. Federal funds usually require State or local match dollars.
An opportunity for additional revenue for all modes of transportation is a local sales tax to fund a
voter-approved slate of projects developed through the Regional Transportation Authority.
8.2 RIGHT-OF-WAY OPPORTUNITIES AND CONSTRAINTS
General right-of-way opportunities and constraints along SR 77 were evaluated through a review
of right-of-way maps for the corridor. In the review of the right-of-way maps, emphasis was
placed on identifying the minimum ROW width on SR 77 segments and using this information to
identify areas that had insufficient right-of-way width for either the eight-lane widening
alternative or for construction of diamond lanes. These areas are shown in Exhibit 8-1, and
shown in tabular form in Exhibit 8-2.
Based on the information presented in Section 7.1.4, it was assumed that the urban cross-section
of the eight-lane alternative would have a mid-block width of 146 feet, and the fringe urban
cross-section would require 200 feet of ROW. The urban cross-section for the diamond lane
alternative was assumed to have the following mid-block characteristics:
• 6 - 2’ travel lanes
• 2 -15’ diamond lanes (buses, bicycles, and right-turns)
• 1 - 20’ median, and
• 2 - 8’ areas behind the curb (including sidewalk)
Total ROW = 138 feet
The fringe urban cross-section is capable of accommodating the diamond lane alternative within
the 200 feet of available ROW. Minimum mid-block right-of-way widths for segments of SR 77
are indicated in Exhibit 8-3. These minimum ROW widths were used to identify general
constraints to roadway widening along the corridor by comparing these widths to the mid-block
cross-section width required for the eight-lane and diamond lane alternatives. The results of this
comparison are also shown in Exhibit 8-3.
SR 77/Oracle Road Multimodal Corridor Profile Study May 2007
Final Report Page 8-1