State Route 77 (also known as 400 South) is a primary transportation corridor for the communities of Springville and Mapleton and also serves as the main route to Hobble Creek Canyon. During the past decade, the area has experienced tremendous growth and projections indicate it will continue for the next several years.

In order to make long-term improvements to 400 South and the I-15 interchange, UDOT will:

• Rebuild the existing freeway interchange as a single-point urban interchange (or SPUI);
• Add an auxiliary lane along southbound I-15 between the two Springville interchanges;
• Widen 400 South to four lanes from I-15 to Main Street in Springville;
• Build a new bridge over the Union Pacific Railroad at 1500 West and replace the existing bridge at 400 West.

Once the project is complete, commuters, business owners and residents should experience:

• Improved traffic flow at the I-15 interchange;
• Improved travel times by separating all railroad crossings along 400 South and expanding the road to four lanes;
• Safe and efficient access to businesses and properties.

$89 million of federal and state funds have been allocated for this project.

I-15 Interchange Area at 400 South (SR-77):
Crews continue to remove the excess material from the new ramp embankments on the south side. Work on the bridge parapets (small walls along the edges of a bridge) and road transition areas at each end of the bridge are underway. Concrete will be placed beginning next week.

Crews will install storm drain across the southbound on-ramp. Paving operations at the ramps are scheduled to begin the week of July 13. Motorists should expect slight delays to allow truck access to and from the work areas.

Toward the end of July, all traffic will be diverted onto the new bridge section.

1750 West Area:
All traffic in this area is shifted to the south side of the road while crews build the north half of 400 South between I-15 and 1750 West. Travel lanes will be narrowed. Flaggers, signs and other traffic control measures will be placed to guide drivers through the work zone. Motorists should expect moderate travel delays.

1500 West Area:
Crews are placing additional material to accelerate the settling and consolidation of the embankments. Crews are building the bridge abutments (support walls for the bridge) and will place concrete girders (support beams) July 10-11 and 13-14.

Crews will continue building the new road section of 400 South between 1500 West and 400 West. This work will continue through July.

400 West Area:
Construction of the retaining walls for both sides of the bridge continues. The walls on the west side of the bridge will be complete by mid-July. The walls on the east side should be complete by the end of July. Residents and businesses within this area should expect an increase in heavy truck traffic through August. The temporary roads are narrowed and rough, but access to driveways will be maintained as much as possible.

Between Main Street and 200 West, new curb and gutter has been installed and crews will pour new driveways entrances. Residents will not be able to use their driveways for at least seven days to allow the concrete to set. Paving operations will also begin toward the middle of the week in this area. Residents will feel some vibration due to this work.

General Project Information:
The speed limit along I-15 is reduced to 55 mph through the construction zone. Please drive the posted speed limits along the detour routes and remember that fines for speeding in a construction zone are doubled.

Work hours are between 7 a.m. and 6 p.m. Monday through Saturday. Please use caution as you travel through the construction area as heavy equipment and crews are working nearby.

If you have questions regarding this project or would like additional information, feel free to contact us at 1.877.222.3757, via email at access@utah.gov or visit the project Web site at www.udot.utah.gov/access and click on the S.R. 77 project.

Motorists who use 1850 South in Provo to access Mapleton and Springville will need to use 1400 North in Springville (S.R. 75) as 1850 South will be closed for construction. For more information regarding this project, please contact Dave Graves, Provo City Engineer, at 801.852.6745.

If you have questions regarding the I-15 resurfacing project between Springville and Orem please contact the UDOT regional office at 801.227.8000.