NAMPA, Idaho — Construction is officially underway in downtown Nampa to convert a stretch of 11th Avenue South into two-way traffic.
The months-long project begins with phase one between Second Street South and Third Street South. City leaders hope the changes will improve safety for drivers, pedestrians, and businesses.
WATCH | See what the Nampa construction project entails—
"There's a lot of confusion from drivers and how to navigate this, which can lead to additional congestion and even car crashes," City Traffic Engineering Manager Matt Ricks said.
The project includes upgrading utilities, installing new traffic signals, improving sidewalks, and replacing aging pavement.
"So, for example, water lines on the roadway will be replaced," Ricks said. "New traffic signals and then we also are replacing the pavement in that whole section because it's needed it."
Detour map here—
Construction will happen in three phases through the summer. Phases two and three will add new curbs, pedestrian facilities, widen sections of 11th Avenue South, and install new signals at key intersections.
Drivers can expect lane closures and detours throughout construction. At least two lanes will remain open during the day from 6 a.m. to 8 p.m., with one lane open overnight. Access to the downtown parking garage will be limited, and the city recommends drivers use the Third Street South entrance. Pedestrian detours will also be posted.
"There will be a closure south of 11th and 3rd for the work we need to do there, so that portion between 3rd and 4th will be closed, and there will be detours associated with that," Ricks said.
Neighbor Terry Smith commented on the 2C Neighborhood News Facebook page, saying they are excited about the long-term changes but are avoiding the area during construction.
Despite the disruptions, Ricks said the city worked closely with local businesses ahead of the construction.
"There's been some right-of-way purchases we've had to make, so we've coordinated on that," Ricks said. "Local businesses have been informed on impacts that will happen to them."
The project is expected to be completed by September 2026.
The city is reminding drivers that starting April 6, the 11th Avenue South entrance to the parking garage will be closed. Drivers are advised to use the 3rd Street South entrance.
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