Interstate 84 drivers will start dealing with intermittent closures on March 10 between milepost 38 (the Idaho Center Boulevard-Garrity Boulevard exit) and milepost 42 (Ten Mile Road exit) because crews will need space to work.

The space is needed so crews can set 20 girders for the “Treasure Valley’s first-ever tri-level flyover ramp at the future I-84 and Highway 16 interchange,” according to an Idaho Transportation Department (ITD) news release.

According to the release, this will mostly impact drivers who use the four-mile stretch at night, and then weekend drivers.

On March 10-11, eastbound I-84 will close from 10 p.m. to 5 a.m. Traffic will detour to Franklin Road, according to the release. The drivers will drive east on Franklin Road and get back onto the interstate at the Ten Mile Road exit.

On March 13, eastbound I-84 will close again from 10 p.m. to 5 a.m. at the Idaho Center Boulevard-Garrity Boulevard exit. Traffic will detour to Franklin Road and drivers will head east. Westbound drivers will be reduced to two lanes.

March 14-16, eastbound I-84 will be closed starting at 6 a.m. on March 14 between Garrity Boulevard and Ten Mile Road. The closures will last until March 16, at 5 a.m. The traffic will exit the interstate and re-enter using the new ramps, which will take drivers from Idaho Center Boulevard-Garrity Boulevard (milepost 38), to Ten Mile Road.

And then between March 17-20, and on March 23, the westbound lanes will close from 10 p.m. to 5 a.m. each night. Traffic will also detour to Franklin Road at the Ten Mile Road exit. Those drivers will need to take Franklin Road until Garrity Boulevard, where they will get back onto the highway.

The westbound lane reductions “occur during the same time frame as the listed closures,” according to Jill Youmans, ITD’s district 3 public information officer.

Youmans said drivers should expect delays, “particularly during the full eastbound closures and the weekend work window,” Youmans said. “However, most of the work is scheduled overnight, when traffic volumes on I-84 are significantly lower.”

Youmans said to place the steel girders, the crews “must lift and set very heavy materials over the interstate.”

Each girder weighs about 78,000 pounds, and their lengths vary between 135 and 195 feet, according to ITD.

“For safety reasons, traffic needs to be detoured while that work takes place. When possible, we schedule closures at night to reduce impacts to drivers while maintaining a safe work zone for both the traveling public and crews.”

After this period, drivers should expect ongoing nighttime lane restrictions to continue on the interstate through spring, according to the release. All dates are subject to change based on weather and/or other “unforeseen circumstances,” the release states.

Text HIGHWAY16 to 866-483-8422 to sign up for updates, the release states. For maps and details about the project, visit itd.idaho.gov/project/sh16construction.