Following a speed study of I-84 in the urbanized parts of the Treasure Valley, the Idaho Transportation Department (ITD) is reducing the speed limit on the western side of Caldwell to 65 MPH.
The current speed limit on I-84 traveling west goes from 65 MPH to 80 MPH after the Notus/Parma Exit (Exit 26). Due to the high number of vehicles using Middleton Exit (Exit 25) both east- and westbound coupled with varying speeds of thru traffic and merging vehicles, the Department determined a speed reduction was warranted. The 65 MPH speed zone will now extend west of Exit 25. Crews will place new speed limit signs today.
“We observed significant variations in speeds, with entering traffic speeding up to merge with I-84 traffic, which was slowing for the speed limit change,” said ITD Traffic Technical Engineer Erika Bowen. “This resulted in a number of near misses between cars on the Interstate and those looking to enter. Given the high demand at the Middleton Exit, we believe the change will improve the driving conditions in this area.”
ITD routinely studies sections of the State Highways System to ensure the safety, mobility, and economic opportunity of the traveling public is best served. Staff looks at the pavement condition, crash history, geometry, signage, and observed driver behavior when considering changes to the highway.
Over the last five years, growth near the Middleton Exit has seen an increase of 5,000 vehicles per day added to this section of I-84. During the evening commute, congestion often occurs at Exit 25 causing backups on the westbound off-ramps. ITD is looking at solutions for this separate situation to improve the efficiency of the interchange.
BOISE – The Idaho Transportation Board approved a resolution to allocate more than $100 million toward funding expansion in the Interstate 84 Caldwell to Nampa Corridor during the monthly meeting today (Thursday, Oct. 12) in Boise.
“The Transportation Board recognizes the need to address congestion in this corridor and are focusing funds here to make greater gains toward improving the corridor,” said Transportation Board Chairman Jerry Whitehead.
Funding sources include the Transportation Expansion and Congestion Mitigation (TECM) Program money for fiscal years 2018 and 2019 approved by this year’s legislature, 2018 General Fund Surplus, and several other state funding sources. These funds are still pending spending authorization from the 2018 legislature.
The money approved today also will be used to strengthen an application for $90 million in a federal grant for this corridor.
“Combining these new state dollars toward the I-84 expansion allows ITD to leverage our resources to address this crucial corridor, and potentially free up and leverage funds for other needs,” said Whitehead.
BOISE – The Idaho Transportation Department will begin initial construction activities next week on a summer project to resurface deteriorated pavement on Interstate 84 between Nampa and Caldwell.
ITD will share details about construction activities and sequencing at a community open house Thursday, May 25 at the Hampton Inn at 5770 Franklin Road in Nampa. Community members are invited to come at their convenience from 11 a.m. to 1:30 p.m. or from 3 p.m. to 6:30 p.m.
ITD is using weekend and nighttime traffic control to minimize traffic impacts during the weekday commute.
During four weekends this summer, ITD will shift all I-84 traffic to one side of the interstate (eastbound or westbound) while crews work on the other side. On these four weekends, one lane of traffic will be open in both directions between Nampa and Caldwell from 7 p.m. Friday to 5 a.m. Monday. All lanes of I-84 will be open during the weekday.
Check out the project website here.
Final weekend dates will be scheduled based on factors such as traffic counts, weather predictions, equipment and materials availability, and the project schedule.
Community members may request email notification of the weekend dates by texting INTERSTATE84 to 22828. ITD will announce exact dates as soon as they are scheduled.
Other traffic impacts for the project will include occasional nighttime lane restrictions, shoulder closures and speed-limit reductions. The project includes resurfacing I-84, the Northside Boulevard interchange ramps and two ramps at the Franklin Boulevard Interchange. Guardrails will be improved throughout the project area.
Idaho Materials Construction is the contractor for this $9.5 million project.