Projects

Blue Lakes Boulevard and Pole Line Road Project

The Idaho Transportation Department (ITD) has begun a project to evaluate the Blue Lakes Boulevard and Pole Line Road intersection and surrounding roadway system.

Blue Lakes Boulevard and Pole Line Road Project

The Idaho Transportation Department (ITD) has begun a project to evaluate the Blue Lakes Boulevard and Pole Line Road intersection and surrounding roadway system.

Overview

The Idaho Transportation Department (ITD) has begun a project to evaluate the Blue Lakes Boulevard and Pole Line Road intersection and surrounding roadway system.

The purpose of the project is to identify improvements that improve mobility and safety at the intersection. We welcome your comments and invite you to follow along with project updates. Provide feedback to the project team and sign up for project updates using the button below.

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Project Background

The Blue Lakes Boulevard and Pole Line Road intersection serves as a gateway intersection into the City of Twin Falls for vehicles, both passenger vehicles and heavy freight, traveling from I-84 and across the Perrine Bridge just north of the intersection. Today, this intersection is one of the busiest in the area and experiences high levels of congestion. Conditions are anticipated to worsen as the area continues to grow.

Infographic displaying project background in four categories. Congestion section shows the intersection is one of the busiest in the area with over 57,000 vehicles per day, high delays during peak hours, and eastbound left-turns from Pole Line Road to Blue Lakes Boulevard back up daily. Safety section shows within the study area: 1,256 total crashes reported in the last five years from 2020 to 2024, 2 fatal crashes, 20 severe injury crashes, and 10 crashes associated with people walking or biking. Freight section notes US-93 travels through the intersection and is a regionally important freight route that provides direct access between I-84 and the Twin Falls Area. Approximately 3,800 heavy vehicles travel through the intersection every day. Commercial Access section states the Blue Lakes Boulevard and Pole Line Road intersection serves as the gateway into the City of Twin Falls. The study area is surrounded by and provides the heaviest concentration of commercial land-uses in southern Idaho, with over 40 driveways within close proximity to the Blue Lakes Boulevard and Pole Line Road intersection.

Project Study Area

The study area includes 7 signalized intersections,13 unsignalized intersections, and over 50 commercial driveways and accesses.

  • Northern limit on US-93 is Golf Course Road
  • Southern limit on Blue Lakes Boulevard is Falls Avenue
  • Western limit on Pole Line Road is approximately 1000 feet west of Fillmore Street 
  • Eastern limit on Pole Line Road is east of Bridgeview Boulevard
Figure 1. Project Study Area map for the Blue Lakes Boulevard and Pole Line Road Project in Twin Falls, Idaho. The map shows study intersections along US-93/Blue Lakes Boulevard and surrounding local roadways, with the Snake River canyon visible to the north

Project Overview

The goal of the study is to identify improvements for the Blue Lakes Boulevard and Pole Line Road intersection and surrounding area that may be implemented in the short, medium, or long term. The improvements will aim to improve both safety and traffic congestion. This study will identify improvements through a tiered alternatives evaluation, as shown in the graphic below.

We will engage with partner agencies, stakeholders, business and property owners, and the public to better understand the needs and challenges within the study area and work collaboratively to identify improvements.

The study began in Fall 2025 and is anticipated to finish by the end of 2026; we are currently working on the Tier 2 Alternatives Analysis phase. Note that funding has not yet been identified for design or construction of improvements identified in this study.

The existing and future no-build evaluation started in the Fall of 2025 and was completed in January 2026. In February 2026, the project team met with the Business and Property Owners Advisory Group to introduce the project’ s background and purpose. During the meeting, the project team shared results of the existing and future no-build evaluation and gathered feedback on transportation deficiencies and concerns that exist within the study area today. Using this feedback, along with feedback from partner agencies and stakeholders, the project team identified and screened over 20 initial alternatives, which were presented to the Technical Advisory Group and Project Advisory Group in January and February 2026. Of those 20+ alternatives, eight (8) alternatives were selected for the Tier 1 evaluation. The Tier 1 evaluation began in February 2026 and was completed in May 2026. Up to five alternatives have been selected to move forward into the next phase, the Tier 2 evaluation, which is anticipated to be complete this Fall 2026.

Funnel diagram illustrating the alternatives evaluation process and its current status. At the top, Data Collection, Existing and Future Conditions Evaluation, and Traffic Signal System Inventory feed into the funnel. The process begins with Alternative Identification and Screening (marked Completed), which includes a wide range of alternatives from signal timing to intersection reconfiguration and high-level screening of 20+ alternatives. Next, Tier 1 Alternatives Analysis (marked Completed) narrows to up to 10 alternatives through traffic modeling, concept illustrations, and cost estimates. Then, Tier 2 Alternatives Analysis (marked In Progress) further refines to up to 5 alternatives through detailed traffic modeling, concept design, refined cost estimates, and a value planning workshop. Finally, the Implementation Plan stage, not yet started, will result in the Selection of Preferred Alternatives at the bottom of the funnel.

Downloads & Resources

Technical Memo # 1

Existing & Future No Build Memorandum (FINAL).pdf

Existing & Future No Build Memorandum (FINAL)_Attachments.pdf

Business and Property Owner Advisory Group Meeting #1 – February 2026

Business Property Owner Advisory Group Meeting 1_Display Boards.pdf

Business Property Owner Advisory Group Meeting 1_Summary.pdf

Technical Memo # 2

Tier 1 Alternatives Evaluation (FINAL).pdf

Tier 1 Alternatives Evaluation (FINAL)_Attachments.pdf

Tier 1 Alternatives Moving to Tier 2 Evaluation.pdf

Business and Property Owner Advisory Group Meeting #2 – September 2026 (Upcoming)

Meeting materials will be made available on the day of this meeting

How to Participate

Project Website – This project website will be updated periodically throughout the project as key project milestones are completed.

Public Open House – A community open house will be held following the selection of the preferred alternatives to share the chosen designs and discuss next steps for the project.

Upcoming Business and Property Owner Advisory Group Meeting #2 – The Business and Property Owner Advisory Group consists of representatives from businesses and properties within the study area. The purpose of the group is to help identify and discuss traffic-related challenges, including access to and from businesses in the surrounding area.

  • Date & Time: Thursday, September 17, 2026 at 1:30 – 3:30 pm
  • Location: 315 Falls Ave, College of Southern Idaho, Taylor Bld. RM 276

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Contacts

Brock Dillé
ITD Project Manager
brock.dille@itd.idaho.gov
208.544.7906

Courtney Wagner
ITD Communication
Courtney.Wagner@itd.idaho.gov
208.886.7800

Andy Daleiden
Consultant Project Principal
adaleiden@kittelson.com
208.472.9804