Timeline - Loop 303 from Interstate 10 to Proposed State Route 30

Study Timeline

  • Draft EA/DCR - Spring 2018
  • Public Hearing - Summer 2018
  • Final EA/DCR - Fall 2018


Loop 303 south of Van Buren Street is in the planning phase of ADOT’s project development process.  ADOT is currently evaluating potential corridors with the establishment of general locations and basic characteristics (interchanges, frontage roads, vertical profiles, etc.).  Associated activities include environmental studies (air quality, noise, cultural resources, etc.), identification and evaluation of alternatives, general cost estimates, partnering with public and private stakeholders, and the determination of feasibility to move to the design phase.


The design of a roadway involves several phases of detailed engineering, technical review, and interim levels of approval.  The final design of the roadway is represented in plans and specifications that construction contractors use to prepare construction bids.


Road construction is based on the approved design.  As the construction process advances, changes may occur that are influenced by a variety of factors.  ADOT continually looks for ways to improve the construction process for maximum efficiency and minimal community impact.

  • Construction of Loop 303 south, between I-10 and Van Buren Street, began in February 2016 and was completed in October 2017.
  • Construction of Loop 303 south, between Van Buren Street to MC 85, is scheduled to begin final design in the Winter of 2018 and begin construction after Fall 2020, per the ADOT Five-Year Program.
  • The 2018 Regional Transportation Plan Freeway Program includes a study to connect the Loop 303 to the planned SR 30.