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.

Fierce competition for workers is one of the top issues today in Arizona. Many people may be surprised to hear that anything related to the state’s economic situation is on a list of pressing issues. Arizona’s economy is and remains robust, the state is finding it difficult to supply workers in demand by industry. The result is a new but deep threat to our economic future. Businesses’ inability to find and retain the workers they need, where they will need them, may in fact be the spear that unexpectedly pierces the state’s prosperity.

Arizonans have been divided in their feelings about growth and what to do about it, especially during the past two decades. To complicate matters, the debate over the best responses to growth has been drawn along overly simplistic lines—the economy versus the environment. Arizonans who follow the myriad issues related to urban growth closely are becoming convinced that the discussion needs to be recast in a new light.

Scholar Leo Marx coined the phrase “the machine in the garden” in 1964 to describe the relationship between nature and technology. Considering much of the writing about Arizona’s growth, it seemed an apt title for this volume of Arizona Policy Choices. "The Machine in the Garden" presents growth policy choices for Arizona along a continuum: Yesterday’s Growth—the policies that have been used in the past; Today’s Growth—the “smarter” approaches from around the country; and Tomorrow’s Growth—cutting edge thinking about the economy and experiments in urbanism and governance.

This report brings together the results of a survey of 1100 homeless people living in and around downtown Phoenix in 1996 with the results of a similar survey conducted in 1983. In addition to providing a snapshot of the homeless population in Phoenix, the data and comparative information presented in this report also reveal the complex and intractable nature of the homeless problem in general.

Believing that voters might support transit if they felt like an integral part of the transit proposal decision-making process, the Phoenix Chamber of Commerce's Valleywide Transit Task Force set out in early 1995 to initiate a bottom-up process which would enable people to say, "here's what we want." The Task Force agreed that the first step in the process was to initiate a new dialogue. the Morrison Institute for Public Policy was asked to write a briefing paper, which would re-invigorate the transit debate. The resulting report, "Transit in the Valley: Where Do We Go From Here?" painted a bleak picture of the Valley's existing transit system and challenged many long-held conventional wisdoms. The dialogue had begun. The report was then presented to the citizens of 17 Valley cities and towns for their consideration in 16 public meetings sponsored by cities and their local Chambers of Commerce. In community forums conducted between October 1996 and February 1997, more than 500 Valley residents discussed the Valley's transit future. This document summarizes the questionnaire responses by 501 people who attended the forums.

In the Valley, developing viable long-term transit from where we are currently will be very difficult if key
components continue to remain unaligned. Thus, before getting to the primary purpose of this report, it is important to first establish the players and basic considerations relevant to the effectiveness of a transit system.

Few would dispute that the Phoenix metropolitan area is severely lacking in terms of mass-transit compared to other similarly sized and configured cities. The Valley’s fleet of roughly 400 buses is about one-third of the service found in San Diego, Atlanta, and Seattle. In addition, most of Phoenix’ peer regions either already have, or are planning rail systems. Of the 30 largest metropolitan areas in the U.S., only six -- Phoenix included -- do not currently have or are not planning to add rail to their transit system.