The Arizona Department of Transportation (ADOT), in cooperation with the Federal Highway Administration (FHWA), initiated a Design Concept Report (DCR) and environmental study to evaluate the addition of one general-purpose travel lane in each direction on a 13-mile stretch of Loop 101 (Pima Freeway) from I-17 to Princess Drive.
Growing traffic demand has caused the Loop 101 corridor to become increasingly congested during the morning and evening peak travel periods, and traffic volume projections indicate the congestion will worsen in the future. This study evaluated the addition of general-purpose travel lanes to increase freeway capacity and help alleviate increased levels of traffic congestion in the future.
The study evaluated numerous alternatives and potential impacts of providing the additional travel lanes, and the DCR includes a preliminary design concept for the recommended improvements. Potential environmental impacts will be documented in an environmental document following the requirements of the National Environmental Policy Act (NEPA). This study is a component of the Maricopa Association of Governments' Regional Transportation Plan Freeway Program. Multiple design alternatives were evaluated and considered for this study.