Idaho Falls Plans Signals and Turn Lanes at 15th East and 49th South

IDAHO FALLS — The intersection of 15th East and 49th South in Idaho Falls, Idaho, is in line for safety improvements. The City of Idaho Falls, Bonneville County and the Local Highway Technical Assistance Council (LHTAC) are planning to add traffic signals, left-turn lanes, streetlights, pedestrian ramps and crosswalks, the city announced Nov. 4, 2026.

The 15th East and 49th South project is funded by a federal grant meant to address crashes at the intersection. Between 2018 and 2022, there were 26 crashes there, according to the city.

Why 15th East and 49th South

The city says the intersection is on an important route for southern Idaho Falls, and more development in the area will bring more traffic. The improvements are meant to keep the intersection safe and efficient as that growth arrives, the city said. The Post Register also reported on the plans.

How to comment and the timeline

The project team held an open house Nov. 5 at the Bonneville County Fairgrounds Carriage House to show proposed designs. Anyone who missed it can still weigh in: comments are being accepted through Nov. 20 on the city's online comment page, and project information is available by emailing the contact on the original listing.

Design plans are expected to be finalized in early 2027, and construction is expected to begin in late 2027 or early 2028, according to the city.

Living in south Idaho Falls

Southern Idaho Falls continues to grow, and the city expects more development near this intersection. See the Idaho Falls city guide, browse new home communities in Idaho Falls like Sand Creek Estates and Fairway Estates, check homes for sale in Idaho Falls, or read about the US-26 and Hitt Road project and more Idaho Falls growth news. Thank you for reading Treasure Idaho.