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 Old U.S. Highway 80 Area Plan is an entirely new plan which removes portions of the State Route 85 Area Plan and the Tonopah/Arlington Area Plan. It is important to note that this Plan is not a document that represents final buildout as many municipal general plans typically do. Rather, it prepares for and accommodates growth over the next ten to fifteen years, but will be reexamined and updated as necessary to reflect current conditions and changes. While not a complete solution, the Plan helps address the effects of growth and development by enhancing cooperation between government agencies, citizens, and other affected interests, and by considering regional implications.

It is important to note that the Rio Verde Foothills Area Plan is not a document that represents ultimate buildout as many municipal general plans typically do. Rather, it prepares for and accommodates growth over the next ten to fifteen years, but will be reexamined and updated periodically to reflect current conditions and changes. While not a complete solution, the Rio Verde Foothills Area Plan helps address the effects of growth and development by enhancing cooperation between government agencies, citizens, and other affected interests, and by considering regional implications.

It is likely that urban growth is occurring and will occur along the McMicken Dam Scenic Corridor, which will present residents and stakeholders with important changes. Mitigating the potential impacts of these changes will continue to be a high priority for Maricopa County. Because these guidelines reflect the recommendations of residents and other stakeholders, they provide a unique opportunity for these residents and stakeholders to participate in the future growth and development of their area.

It is likely that urban growth will occur along Olive Avenue, which will present residents and stakeholders with important changes. Mitigating the potential impacts of these changes will continue to be a high priority for Maricopa County. Because these guidelines reflect the recommendations of residents and other stakeholders, they provide a unique opportunity for these residents and stakeholders to participate in the future growth and development of their area.

It is likely that urban growth eventually will occur along State Route 74, which will present residents and stakeholders with important changes to their lifestyles. Mitigating the potential impacts of urban growth will continue to be a high priority for Maricopa County. Because these guidelines reflect the recommendations of residents and other stakeholders, they provide a unique opportunity for these residents and stakeholders to participate in the future growth and development of their area.

It is likely that urban growth eventually will occur along Castle Hot Springs Road, which will present residents and stakeholders with important changes to their lifestyles. Mitigating the potential impacts of urban growth will continue to be a high priority for Maricopa County. Because these guidelines reflect the recommendations of residents and other stakeholders, they provide a unique opportunity for these residents and stakeholders to participate in the future growth and development of their area.