Construction Update | September 12, 2025 

NB I-15 – Upcoming Traffic Shift & Nighttime Lane Closures

Beginning Monday, Sept. 15, crews will shift I-15 northbound traffic. Drivers should expect nighttime lane closures (7 p.m. – 5 a.m.).

I-15 north and southbound lanes and Wardleigh Rd. Thru-U

Upcoming Work

1900 West – Missile Way Closure - Sept. 19-21

From Friday, Sept. 19 through Sunday, Sept. 21, 1900 West (5600 South to Missile Way) and Wardleigh Road will impacted by construction as crews complete milling, paving, and removal of the temporary Thru-U configuration.

Closure & Traffic Details: 

Friday night, Sept. 19: 

• Full closure of 1900 W/Wardleigh Rd. to reset signals and striping 

​Saturday, Sept. 20: 

• Westbound 5600 South Closed
  • ​Traffic exiting Hill Air Force base must turn left at the intersection and utilize Freeway Park Dr. to Riverdale Rd.
• Eastbound 5600 South Open with Restrictions
  • ​Access to the museum will remain open but limited to one lane 
  • Visitors may also access the museum via Freeway Park Dr. 

​Sunday, Sept. 21: 

• Work continues with lane restrictions while paving is completed

​Drivers, please allow extra travel time to reach your destination, follow posted detours, and use caution in the work zone. 

Riverdale Exit Detour - Sept. 22-26

From Monday, Sept. 22 through Friday, Sept. 26, the Riverdale Rd. exit (Exit 338B) will detour onto 5600 South. Drivers will turn right at 5600 South to use Freeway Park Dr. to access Riverdale Rd. This detour is to accommodate milling, paving, and barrier work near Riverdale Rd.

Driver Reminders:

• Drivers can use Freeway Park Dr. to reach their Riverdale destinations
• Expect delays during this closure- please plan extra travel time

Important: Drivers, please be aware of this temporary traffic pattern change and plan extra travel time.

I-15 Northbound Temporary Lane Split

Last weekend, crews implemented a I-15 northbound lane split just past the 5600 South northbound off-ramp to the Riverdale Rd. bridge to complete work on the middle section of I-15.

Driver Reminders:

• A northbound lane split beginning just past the 5600 South off-ramp and continue to the Riverdale Rd. bridge.
• Drivers can use either the left or right lane in the split— both options reconnect near the Riverdale Rd. bridge.
• The split will remain in place for approximately 3-weeks while crews replace center panels and finish work on the new I-15 and 5600 South structure.

Drivers plan ahead and use alternate routes. Review the graphic below for lane split information.

Ongoing Work

5600 Corridor

Work is progressing along the 5600 South corridor as crews complete curb, gutter, and driveway tie-ins. Coordination with property owners will continue throughout this phase of construction. Occasional road closures may be necessary to while crews pour and finish concrete surfaces such as sidewalks, driveways and curbing.

Current Street Closures:

• 2100 West (North side) – Right turn in, right turn out only from 5600 South through mid-September*
• 2700 West (South side) – Closed Sept 8. – for approximately 2-weeks*
• 3375 West (North side) – Closed Sept. 8 – for approximately 2-weeks*
• 2050 West – Closed through summer*

Drivers use alternate routes and expect minor delays.

Overview of the UPRR bridge.

Pedestrian Safe Walking Routes

Temporary 3-Month Traffic Pattern at I-15 & 5600 South (SR-97)

As part of the I-15 interchange construction, a 3-month, temporary traffic pattern – commonly referred to as a "Thru-U"– is now in effect at 1900 West and 5600 South between 2050 West and Wardleigh Rd. This configuration will be in place for approximately 3-months.
 

Key Driver Reminders:

• No left turns from 5600 South onto 1900 West (east and westbound)
• Additional left turn restrictions at I-15 off ramps
• Stay alert for new traffic pattern
• Plan ahead to reach your final destination safely

Watch the video below to learn how to navigate the temporary Thru-U.
 

5600 South (SR-97) – Bridge Beam Installation

Earlier this month, crews successfully installed bridge girders (beams) on the south side of 5600 South bridge over the Union Pacific Railroad (UPRR). This operation was completed over night, each night throughout the weekend, and required long hours, a large support crew, and utilitizing state-of-the-art equipment to ensure a safe and efficient installation.

More details of the bridge installation will be shared in future updates.

Crews completed preparation activities to install the new bridge girders over the UPRR bridge.

I-15 NB Off-Ramp and Riverdale Rd. Access – Exit 338

Last month, the I-15 northbound off-ramp at Exit 338 (exit 338B) shifted onto the new overpass, which will provide direct access to Riverdale Rd.

What to Expect:

• A new traffic pattern over the completed overpass
• Updated overhead signage
• New lane markings
• Adjusted traffic flow into Riverdale
• Drivers, be alert for changes in overhead signage, lane markings and traffic flow.

Improved Flow and Faster Access

This new traffic pattern is designed to improve traffic flow through the area. By shifting the off-ramp onto the new overpass, drivers will no longer need to stop at the previous ramp intersection, reducing congestion and travel delays. The direct connection to Riverdale Rd. allows for smoother, more efficient movement of vehicles–resulting in a safer and more streamlined driving experience.

Know Before You Go! Download the UDOT Traffic App Today!
The UDOT Traffic app provides commuters and travelers with mobile access to information for the State of Utah roadways. 

The available information includes:

• Emergency and incident notifications
• Construction alerts
• Anticipated delays and lane closures
• Road conditions
• Travelwise alerts
• A zoomable, scrollable map-based display

*download available for iPhone and Android devices

Learn more about Travelwise Tips here.