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Jacob Wiegand, Deseret News
Drivers approach the I-215 and Redwood Road interchange in North Salt Lake on Monday, April 2, 2018. Reconstructing the interchange is one of the Utah Department Transportation's top 10 projects this year. In all, the agency has 188 projects scheduled across the state.

SALT LAKE CITY — The stretch of I-15 now being called the state's "Technology Corridor" ranks No. 1 on the Utah Department of Transportation's Top 10 list of construction projects for 2018.

Some work on the $450 million project to widen the freeway to six lanes in both directions between the Timpanogos Highway, state Route 92, and Main Street in Lehi, started Monday, including removing the median barrier.

But UDOT spokesman John Gleason said most drivers won't notice a difference in their commutes until later this month.

"There will be some overnight lane closures that won’t affect peak hours, but they won't see orange construction barrels out on I-15 for another couple of weeks, probably mid- to late April," he said.

He said steps will be taken to ease the impact on drivers during the project, set to be completed in late 2020, including narrowing the lanes that will remain open to accommodate more vehicles.

"We recognize with construction activities comes inconveniences," Gleason said of the UDOT projects. "We try to take to make it as easy to navigate as possible and keep traffic moving as much as possible to minimize some of those headaches."

The I-15 project is key to developing Utah's Silicon Slopes technology corridor that includes 700 acres at Point of the Mountain that will be freed up after the Utah State Prison moves to a site near the Salt Lake City International Airport in 2020.

The other nine projects on the list released Monday are, in order of their rankings:

• Adding a new southbound lane on I-15 from 2100 South to 12300 South, redesigning some of the southbound ramps at the 1-15 and I-215 interchange and widening 7200 South to three lanes from I-15 to Bingham Junction Boulevard in Midvale. Work on the $180 million project is also scheduled to begin this spring and expected to be completed in late 2019.

• Reconstructing I-215 in Davis County from the I-15 interchange in North Salt Lake to 2100 North and building a new diverging diamond interchange at Redwood Road and I-215. The $40 million project has been underway since February and will continue through the end of the year.

• Replacing three bridges on I-80 in Tooele County near the state Route 36 interchange: eastbound and westbound I-80 over the railroad tracks and the S.R. 36 ramp bridge. The $30 million in bridge work will begin in late spring and should be done in the summer of 2019.

• Widening Bluff Street in St. George from 100 South to Sunset Boulevard by adding a lane in each direction and turn lanes at several intersections. The yearlong, $51 million project started in January.

• Adding a new westbound lane for trucks on I-80 from Jeremy Ranch to Parleys Summit, and a new wildlife crossing at the summit, repaving I-80 from Lambs Canyon to Kimball Junction. Work on the $30 million project started Monday and is expected to be finished by the end of the year.

• Extending Mountain View Corridor in Utah County from the Redwood Road and 2100 North intersection to state Route 73. The $41 million project is set to start this spring and should be done next year.

• Converting four intersections on Bangerter Highway into freeway-style interchanges, at 5400 South, 7000 South, 9000 South and 11400 South. The $201 million project is underway and due to be completed by the end of the year.

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• Reconstructing state Route 9, the gateway to Zion National Park, through Springdale. The old pavement is already being removed and replaced with new asphalt, and pedestrian and bike improvements are being made. The $19 million project should be done before the peak visitor season begins later this month.

• Finishing the widening and reconstruction of state Route 108 in Syracuse from Antelope Drive to 300 North in Davis County. The $52 million project started a year ago and should be completed this fall.

There are a total of 188 UDOT construction projects scheduled across the state this year, adding up to $1.46 billion. They range from sidewalk and street installations to the major projects on the list.