The objective of this study was to evaluate the effect of typical chemical winter maintenance practices on Arizona Department of Transportation pavements. A review of previous studies on the effect of deicing/anti‐icing chemicals did not yield definitive recommendations, especially for DIAICs typically used by ADOT. Researchers conducted a laboratory study evaluating the effects of magnesium chloride, potassium chloride, sodium chloride, and distilled water on eight different open‐graded rubber‐modified asphalt concrete mixes using the boiling test. All experimental factors were found to be statistically significant, and the researchers provide recommendations on which DIAICs should be used for different binder and aggregate types.

Land Use and Traffic Congestion is an investigation into the links among land use, travel behavior, and traffic congestion. Researchers focused on four transportation corridors in the Phoenix area: three older neighborhoods with relatively mixed, higher density land use, and one suburban area with lower density but high traffic volumes. The analysis suggested that the higher density corridors exhibited less congestion due to the greater mix of uses, shorter trip lengths, more travel by transit and non-motorized modes, and the presence of a secondary street grid system.

As part of the Long Term Pavement Performance (LTPP) Program, the Arizona Department of Transportation constructed eight Specific Pavement Studies 9 (SPS‐9) test sections on Interstate 10 near Phoenix is an overlay project and is accordingly given independent analysis and documentation in this report separate from Arizona SPS‐9B projects located on US 93, which were new construction and are documented in a separate report. The SPS‐9A project studied the effect of asphalt specification and mix designs on flexible pavements, specifically comparing Superpave binders with commonly used agency binders. Opened to traffic in 1995, the project was monitored at regular intervals until it was rehabilitated in 2005. Surface distress, profile, and deflection data collected throughout the life of the pavement were used to evaluate the performance of various flexible pavement design features, layer configurations, and thickness. This report documents the analyses conducted as well as practical findings and lessons learned that will be of interest to ADOT.

This study investigated whether highways acted as barriers to gene flow for pronghorn in northern Arizona. DNA samples from 132 pronghorn were analyzed using eight polymorphic microsatellite loci. Samples represented animals living on opposite sides of US Route 89 (US 89) and State Route 64 (SR 64). Two different modeling approaches indicated that both US 89 and SR 64, and to a lesser extent US Route 180 (US 180), acted as barriers to gene flow. The genetic structuring caused by highways, especially across US 89, is consistent with behavioral data that demonstrated pronghorn rarely cross this highway. This study found no evidence of inbreeding or reduced genetic variation in any of the populations examined, but those effects may take longer to appear. Based on these results, the researchers recommend future genetic monitoring of these populations or assessment of genetic variation across highways with larger traffic volumes or longer histories to determine whether the barrier effects documented here lead to loss of genetic diversity.

The Arizona transportation history project was conceived in anticipation of Arizona’s centennial, which will be celebrated in 2012. Following approval of the Arizona Centennial Plan in 2007, the Arizona Department of Transportation recognized that the centennial celebration would present an opportunity to inform Arizonans of the crucial role that transportation has played in the growth and development of the state.

The report consists of a historical narrative and a series of topical essays. The seven-chapter historical narrative is a history of Arizona’s highways that extends from the pre-Columbian era to the present. The 14 topical essays extend the scope of the history beyond the state’s highway system. They include overviews of the development of other transportation modes (railroads, aviation, and urban transit), a brief history of highway pavements, a lighthearted look at the motoring experience during the 1920s and 1930s, and an exploration of how changes in transportation infrastructure affected some Arizona communities. The topical essays also provide additional historical information on bridges, urban freeways, the Interstate system, ADOT and its predecessor agencies, and famous roads such as U.S. Route 66, U.S. Route 89, the Black Canyon Highway, and the Beeline Highway.

The report also includes a timeline of transportation-related developments. This chronology not only provides an accessible overview of Arizona’s transportation history; it also places that history in a larger context by including transportation-related developments from the rest of the nation and around the world. Finally, the report contains a guide to archives in Arizona that hold significant collections of historical photographs related to the state’s transportation history, a bibliography of published historical sources related to the history of highways in Arizona, and a discussion of how the historical narrative and topical essays could be used to produce publications and media that would be made available to the public.

A study explored performance of the Arizona School-to-Work (STW) system in meeting the six goals established by the state STW Division. Goal 1 was to create a self-sustaining STW system at the state and regional levels. The state developed state policies and goals and provided implementation funding to partnerships, but no continuation funding. Goal 2 was to unite training programs with STW programs. Partnerships implemented STW with some success by expanding career-related programs, but were less successful at coordinating and integrating efforts with other workforce-related organizations. There was no comprehensive effort to implement Goal 3 to identify areas where STW needed support and meet those needs. The state and partnerships addressed Goal 4, community involvement, by recruiting local businesses and industries to STW through public awareness activities, promoting initiatives to businesses at STW conferences, and securing business representation on STW governing boards. Goal 5, to increase public awareness, was achieved through media, brochures, Web sites, and public presentations. Partnerships achieved Goal 6, system evaluation, by maintaining databases to provide information for evaluating the STW system. STW had a modest positive impact on stakeholders' involvement in career-related activities; its implementation varied considerably across partnerships; lack of funding severely limited its statewide potential; and strong leadership at the state level was critical.

This report addresses one central issue: the nature and extent of the teacher shortage in Arizona. Its purpose is to inform policymakers and help prevent poor policy decisions and wasted resources. The report presents new research along with policy and program recommendations intended to serve as points of departure for understanding and discussing teacher supply and demand in Arizona. Among the research findings are the following: (1) Arizona did not have an overall shortage of teachers when this report was written, but a delicate balance existed between demand and supply; (2) despite an overall surplus, teacher shortages were already occurring in specific regions and subject-matter areas, and these shortfalls were expected to worsen; (3) managing attrition and encouraging the return of inactive certified teachers will be crucial to ensure a sufficient teacher pool; and (4) policy changes are needed to increase and monitor Arizona's supply of teachers, especially in specific areas. The report provides policy and program recommendations in four areas: production and recruitment; compensation; classroom environment; and data tracking. Appended are: Potential Components Not Used in This Study; Measures Used and Their Alternatives; Data Sources; 2009-2010 Enrollment and Teacher Projections table; Arizona Inactive Certified Teacher Survey Methodology; and Current Activity of Inactive Certified Teachers and 5 data-related tables. (Contains 35 references, 11 tables, and 8 figures.)

The purpose of this brief report is to provide information about Arizona’s system of workforce development, the Workforce Investment Act of 1998 (WIA), how the Act has been implemented in the greater Phoenix area and the program’s relevance to business. It is an update of a previous brief on the subject from February 2000. Prepared by Morrison Institute for Public Policy at the request of Greater Phoenix Leadership, the information contained in this report is intended for a business audience.