The Ada County Highway District Board of Commissioners voted unanimously to support ITD’s plan to replace the Cloverdale Road bridge over Interstate 84.
The concurrence provides a unified front for ACHD and ITD on how best to address this emergency. The Idaho Transportation Board passed a resolution last week to replace the Cloverdale bridge with a $6-8 million structure.
ITD and ACHD developed a preliminary design for the replacement bridge that will match the county highway district’s long-range plans for Cloverdale Road. ITD District 3 Engineer Amy Revis presented this plan to the ACHD Board on Wednesday. It includes four 11-foot travel lanes, a 5.5-foot raised bike lane, and a 7.5-foot sidewalk.
“I am grateful for the full support of the ACHD Board of Commissioners,” said Revis. “The collaboration between our agencies will help create a bridge that will serve this area well for many years to come. I ask the public to exercise patience as we construct these needed improvements.”
ITD engineers have already been gathering information needed for designing the replacement bridge. When a design is complete, the department will seek bids from contractors to construct the bridge.
The old bridge will remain closed until the new bridge is complete, which is expected to take 12 months. ITD closed the Cloverdale bridge due to extensive damage caused by a fatal crash Saturday, June 16.
The replacement will not include on- or off-ramps to I-84. ITD’s goal is to reopen the important crossing point at Cloverdale quickly. The study and analysis of adding ramps and alternative actions in the area would greatly delay that goal.
The Idaho Transportation Department has received interest regarding the traffic control plan for the Five Mile to Orchard project on Interstate 84. You can see the entire traffic control plan for project by clicking here.
ITD Construction projects that have shoulder or lane restrictions are required to include a traffic control plan that meet the standards included in the federal and state approved Manual on Uniform Traffic Control Devices (MUTCD). These contractor traffic control plans are used to set up signs, barrels, and other traffic control devices for a project.
Below is a brief description of the traffic control plan:
First, the plans for advance warning signs before the lane reduction. This information can be found on page 14 of the traffic control plan.
A section of the traffic control plan for warning signs before the lane closure and construction
The first sign a motorist would encounter is a portable changeable message sign on the right shoulder. This sign read “NIGHT WORK THRU JUNE: CHECK 511.” This sign was placed on the east side of the Eagle Road Overpass.
A minimum of 1,500 feet after the portable changeable message sign, the plan calls for a 4’x4’ orange diamond signs on both shoulders that read “ROAD WORK AHEAD.”
A minimum of 1,000 feet after the “ROAD WORK AHEAD” sign the plan calls for a 6’x3’ white rectangular signs on both shoulders that read “INCREASED FINES FOR WORK ZONE SPEED VIOLATIONS.” Following these signs, a minimum of 1000’ away 4’x4’ orange diamond signs on each shoulder are placed with a “SPEED LIMIT 55” box and arrow pointing up indicating a speed limit reduction ahead.
A minimum of 1,000’ feet beyond these orange diamond sign, the plan calls for 4’x5’ white and black rectangular signs on both shoulders reading “SPEED LIMIT 55.” At this point, drivers have seen four signs on each shoulder over a minimum of 4,500 feet. All of this signage is placed before the lane restriction begins.
The next section ITD highlights is the beginning of the construction zone. This information can be found on page 12 of the traffic control plan.
A section of the traffic control plan showing the placement for signs and barrels before, through, and after the construction zone
A minimum of 1,000 feet after the “SPEED LIMIT 55” signs discussed above, the plan calls for 4’x4’ orange diamond signs on both shoulders indicating the number of lanes closed ahead. This project closed the three left lanes and the signs at this location on the field read “3 LANES CLOSED AHEAD.”
A minimum of 1,500 feet after these signs, the plan calls for 4’x4’ orange diamond signs on both shoulders indicating the left lane is closing ahead (sign 8 in the figure above). A minimum of 1,000’ after this sign, the taper to close off the lane begins.
The plan allows for two options on how to execute a taper. One option is to have a continuous taper closing all three lanes over 1,980 feet. The second is to have three separate tapers, with a tangent (straight) section between each taper.
The plan for this option is detailed as follows. At the beginning of each taper, an illuminated merge right arrow sign is placed. Orange drums with retroreflective lines are used for each taper and tangent section, spaced no more than 55 feet apart.
Each taper must extend a minimum of 660 feet. At the end of each taper, a minimum straight segment (identified as tangent on the plan sheets) of 1,320 feet (1/4 mile) extends until the beginning of the next taper.
Overall, from the first notice of construction at the portable changeable message sign to the final single lane of travel, a vehicle traveling the maximum legal speed would have more than two minutes and twenty seconds to make the appropriate maneuvers and be in the proper lane.
The Cloverdale Overpass Bridge will remain closed indefinitely following a fiery crash on Interstate 84 late Saturday evening.
The fire significantly damaged a section of the overpass. ITD inspectors have evaluated the damage and determined the bridge is not safe to travel on. The bridge will remain closed until full repairs can be made. ITD has assessed it is safe for traffic travelling underneath the bridge on I-84.
ITD will develop an emergency contract to make repairs as quickly as possible. At this time, the department plans to remove and replace the damaged section. This is expected to take several months to complete. Details on the schedule, cost, and traffic impact of repairs will be shared as they are developed.
Shoulder restrictions will be in place on Interstate 84 in Nampa at the Northside Boulevard interchange July 9-12. Crews will be driving test piles in the center median as part of early prep work for ITD’s Northside Interchange Replacement Project.
Pile driving will be done during the day; this work is noisy. No lane closures are anticipated, but drivers are urged to slow down and pay attention in the work zone. Crews will set up traffic control and a work zone the night of July 9 and are anticipated to be complete by the end of the week. Learn more at itd.idaho.gov/84corridor.
This work was originally scheduled to take place June 18-20. It was delayed due to wet ground conditions.
The Idaho Transportation Department is seeking public comment on several long-range plans in Mountain Home.
The Department and the City of Mountain Home have worked together to create concepts for the interchanges at Exits 90 (Old US-30) and 95 (American Legion) as well as access control along American Legion Blvd (Idaho Highway 51 and US-20). You can see project details and leave a comment by visiting the project website.
The redesign on Exit 90 is designed to improve the safety and efficiency of the interchange. It also accommodates a future connection to NW Mashburn Road.
At Exit 95, ITD is asking for public comment on three alternative designs. Each design has its own advantages and trade-offs. Your input will be valuable in helping to determine the best choice.
The access study is a collaborative effort between ITD and Mountain Home to provide long-range guidance on safer configurations for American Legion Blvd. The design promotes safety while ensuring the public can access businesses along the corridor. Once finalized, this plan will provide up-front information for businesses seeking to develop in the area, enhancing the local economy.
The comment period for this study will end May 15, 2018.
BOISE – The Idaho Transportation Department (ITD) has scheduled overnight lane restrictions on Interstate 84 in Nampa next week (Dec. 4-8) to complete geotechnical tests for upcoming improvements to the Interstate. This geotechnical work is one of the first steps of designing substantial improvements to I-84 between the Karcher Interchange and Franklin Boulevard Interchange.
Weather permitting, one lane of east- and westbound I-84 will be closed between 10 p.m. and 5 a.m. from Dec. 4 to Dec. 8.
ITD is planning to widen the interstate, redesign the Northside Interchange and replace the Karcher Overpass and bridges over the railroad and Mason Creek. Improvements are expected to improve safety, capacity and traffic flow in Canyon County for many years. Construction could begin as early as the fall of 2018.
For more information about the I-84, Franklin to Karcher project, visit the project webpage.
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.
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.
