Projects

Jefferson County Traffic Study

Traffic data is being collected and ideas being formulated to serve immediate and long-term transportation solutions in the greater Rigby area.

Jefferson County Traffic Study

Traffic data is being collected and ideas being formulated to serve immediate and long-term transportation solutions in the greater Rigby area.

Overview

The Idaho Transportation Department, in cooperation with Jefferson and Bonneville Counties, is conducting a traffic study and working to formulate both immediate and long-term solutions for transportation in the greater Rigby area.

Aerial view of US-20 Rigby half interchange exit during morning travel time.

Substantial population increases in the Jefferson County area in recent years and known development intentions for the future warrant a need to plan for continued mobility and safety in this region. Movement at the U.S. Highway 20 County Line Road, Rigby and North Rigby Exits, as well as on State Highway 48 and adjoining county roads are all being studied.

Aerial view of US-20 County Line Road exit near Rigby, Idaho, during morning travel time.
Aerial view of US-20 County Line Road exit near Rigby, Idaho, during morning travel time.
Aerial view of US-20 North Rigby Exit during morning travel time.
Aerial view of US-20 North Rigby Exit during morning travel time.

Information and solutions for the future

Jefferson County has consistently ranked as one of the fastest growing counties in Idaho in recent years. This population increase, with even more development anticipated in coming years, means that ITD must plan and work to maintain mobility and safe travel in the area. A study is now underway to:

  • analyze and assess impactful areas
  • meet and coordinate with city and county leaders, developers and business owners 
  • identify recommended projects, including high- level design
  • prioritize the implementation of projects for the future

Jefferson County Map of Speed Study

Aerial view of US-20 Rigby half interchange exit during morning travel time.
Aerial view of US-20 Rigby half interchange exit during morning travel time.

Public Involvement

Community input is an important factor in the success of this study. ITD does not manage all roadways where alternatives are being considered in the process.

Because the alternatives relative to this study involve all parties, opportunities for public involvement will come toward the end of the study period, later in 2026, once more coordination is complete.

Click here to join the email list for this study and receive updates as they are available and submit comments in reply.

Contact

Transportation Planner Jeff Sneddon 208-745-5683, jeffrey.sneddon@itd.idaho.gov

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