We have released the Alternatives and Development Screening Report for the I-15 Spanish Fork Interchange Study! 

After screening several concepts, we have determined that an I-15 interchange at Center Street will be considered as an “alternative,” or a design different from the current infrastructure layout, for further evaluation in the environmental assessment (EA)!


UDOT Study Overview

The Utah Department of Transportation (UDOT) is initiating an Environmental Assessment (EA) to evaluate a potential new interchange on Interstate 15 (I-15) in southwest Spanish Fork in Utah County. 

The study area for the EA includes I-15 between the Main Street Interchange to the north (Exit 257 A-B) and the Benjamin interchange to the south (Exit 253); the area west of I-15, and east of I-15 along Center Street and surrounding roads. 

Study Area

These limits are general and are not intended to constrain the EA and possible solutions. East/west limits depend on potential interchange locations identified in the scoping phase.

UTA Study Overview

While UDOT prepares an EA, the Utah Transit Authority (UTA) will conduct the South Utah Valley Transit Study to evaluate options for expanding FrontRunner transit service in the southern portion of Utah County, which includes Spanish Fork.

The UDOT study and the UTA study are being conducted independently of each other, but both agencies will be collaborating throughout the study process to inform each agency's respective decision-making process.

Find out more about the UTA study here.

Study Process & Schedule

Contact Information

To contact the public information team with questions or concerns:

Hotline: 385-999-7771

Email: i15spanishforkstudy@utah.gov

NEPA Scoping

Spring 2023 - Summer 2023

  • Information gathering
  • 30-day public comment period
  • Virtual and in-person public meetings

Purpose and Need Development

Summer 2023 - Fall 2023

  • Identify existing and future conditions
  • Define goals and objectives
  • Identify evaluation criteria
  • 21-day public comment period

Alternative Screening

Fall 2023 - Winter 2024

  • Develop preliminary alternatives
  • Screening process
    1. Purpose and need
    2. Impact to key

Alternative Evaluation

Winter 2024 - Spring 2024

  • Refine alternatives
  • Evaluate potential impacts

Publish EA

Summer 2024

  • 30-day public comment period
  • Virtual and in-person public meetings

Publish Decision

Fall 2024

  • Respond to public and agency input

Stay Informed

To receive update emails, please contact the public informaiton team at the email address above and enter "Updates" in the subject line.