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.

An update to the Flagstaff Regional Plan 2030 (FRP30), to bring its Road Network Illustration (Map 25) into compliance with Arizona Revised Statute requirements and to resolve inconsistencies between Map 25 and parts of the Flagstaff City Code. This update does not alter the intent of FRP30; it is only concerned with correcting errors, removing legal vulnerability, and improving the readability of FRP30.

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.

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.

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.

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.

The Arizona Head Start--Public School Transition Project is 1 of 31 demonstration projects designed to test whether advances by Head Start children could be maintained by continuing Head Start-type services into kindergarten through the third grade, and to identify, develop, and implement transition practices to bridge the gap between Head Start and public schools. This study evaluated the Arizona project in its fourth year of implementation. Participating were two cohorts of students at three transition and three comparison schools in Phoenix. The program components evaluated were: (1) developmentally appropriate practices, curriculum, and materials; (2) physical health, mental health, and dental services; (3) family services; and (4) parent involvement. Findings indicated that all components had been implemented by the time of the 1995-96 evaluation. Both cohorts had similar public assistance participation, and all groups showed dramatic decreases in public assistance since program entry. The vast majority of parents from all groups reported positive interactions with schools; qualitative data confirmed continuing positive impact on teachers, schools, and the Head Start agency. Transition services, especially those of family advocates, were seen as crucial to smooth transitions. There were observable differences between transition and comparison classrooms; however, quantitative data showed few significant differences in gains made by children between transition and comparison classrooms. Confounding variables of high attrition, variations in student English proficiency, and the existence in comparison schools of transition-like services may have influenced the results. Promising practices and further challenges were identified and recommendations were made for improving the collaboration between the Head Start program and the public schools, and improving the evaluation process. (Three appendices include a summary of data collection instruments. Contains 20 references.)

This report presents the second comprehensive look at the conditions of children and families in Arizona. Building upon information presented in the 1992 Factbook, this document presents and analyzes 48 indicators of child well-being. Following the executive summary and tables, chapter 1 provides an overview of the data for the state as a whole, including a summary of key findings and tables depicting raw numbers, rates adjusted for population growth, and rate changes over time. Racial and ethnic breakdowns are presented when such data are available.

Chapters 2-16 offer individual county profiles, following the general format established in the state chapter. These chapters offer insights into regional variations and identify varying conditions for children across the state. The report charts data within the state and county chapters for each of the following six categories: (1) poverty; (2) child health and safety; (3) child abuse, neglect, and out-of-home care; (4) early care and education; (5) children in school; and (6) teens at-risk. Overall, findings reveal significant improvements for a few indicators since 1990, most notably within birth-related items, such as an increase in the percent of women receiving timely prenatal care and a decrease in low birth-weight births. Findings also suggest there has been a worsening for many indicators, including poverty, firearm-related deaths and hospitalizations, alleged child abuse incidents, and births to teens.