Please be advised of the following traffic impacts, restrictions and planned work for next week for the C-470 & Quincy Roundabout interchange improvement project in Jefferson County.
Traffic has been shifted from the east and south side of W. Quincy Ave. to the north and west side of W. Quincy Ave.
Eastbound traffic is in the north lane at the roundabout and westbound traffic is in the new slip through lane
This new lane alignment is in place at the site of the C-470/W. Quincy Ave. northbound ramp intersection
The two-lane configuration will remain in place until further notice while crews work on the south side of the new roundabout
Three-way stop signs have been added at the Turkey Creek Road intersection and at the C-470 northbound ramp intersection to manage traffic flows, with short delays expected
Additional stop and speed limit signs have been added on eastbound and westbound W. Quincy Ave. to maintain safety in the work zone
A stop sign and a barricade wall are in place at the W. Tufts Ave. and W. Quincy Ave. intersection
A 12-foot width restriction exists through the work zone
Shoulder closures will be taken during certain work activities
Working hours are 7 a.m. to 6 p.m. Monday to Friday, except on holidays
Please exercise caution and obey posted speed limits and signs
The project limits on W. Quincy Ave. extend from Mile Point 0 to MP .56
Signs and construction devices are present to alert motorists to the traffic shift, reduced lanes and work zone restrictions
Construction schedules are weather dependent and subject to change
Work includes drilling and pouring light pole caissons, building sign foundations, and placing topsoil.
Views of construction underway at the northbound and southbound ramp intersections of C-470 & W. Quincy Ave. Photography by Estate Media.
Traffic has been shifted back into its original configuration
Occasional single lane closures will be taken during working hours
Three-way stop signs have been added to manage traffic flows
Lanes are reduced and caution is advised
A 12-foot width restriction exists through the work zone
Shoulder closures will be taken during certain work activities
Working hours are 7 a.m. to 6 p.m. Monday to Friday, except on holidays
Please exercise caution and obey posted speed limits and signs
The project limits at this location extend from Mile Point 0 to MP .225
Signs and construction devices are present to alert motorists to traffic shifts, reduced lanes and work zone restrictions
Construction schedules are weather dependent and subject to change
Work includes drilling and pouring signal and light pole caissons, and adding structural concrete coatings.
Work Zone Safety Alert
Please drive slowly and exercise extreme caution within the project limits as pedestrians and cyclists may be present
Eastbound traffic should take extra precautions due to early morning sun glare
Adjust your speed to avoid sudden reactions
A new traffic pattern is in place on W. Quincy Ave. at the site of the northbound ramp intersection where the roundabout is being built
Traffic is in a two-lane configuration until further notice
New stop signs and speed limit signs have been added within the work zone to manage traffic flows and maintain safety for the traveling public, the construction crews and the surrounding community
New stop signs have been added at the site of the southbound ramp intersection during construction of a T-intersection with traffic signal
Please obey speed limits and traffic signs and exercise caution
Message boards, signs and construction devices are present to alert the public to the work zone, closures and restrictions
General Impacts, Schedule & Scope of Work
The project began in mid-May with an anticipated duration of 18 months
Work includes adding a single lane roundabout with bypass lanes at the Quincy and C-470 northbound ramp intersection, and a T-intersection with traffic signal at the Quincy and C-470 southbound ramp intersection
Other work includes adding capacity, building retaining walls, installing signs, and making drainage improvements
Periodic on and off ramp closures to and from C-470 at Quincy Ave will be taken during off-peak daytime as well as overnight hours
Some closures of half the existing Quincy Ave over C-470 bridge will be taken for roundabout and other construction, with two-way traffic maintained and 12-ft width restriction in place
A single lane closure on northbound C-470 will exist later in the project for sign work
Onsite detour pavement will be built to route traffic around the proposed roundabout location
Other detour routes will be marked for use during later phases of construction
No work will take place on mainline C-470
Normal working hours will be from 7 a.m. to 6 p.m. Monday to Friday
Overnight work can be expected
The project limits on C-470 extend from MP 6.10 to MP 6.80
The project limits on Quincy extend from MP 0 to MP .56
Signs and construction devices will be present to alert the public to the work zone, closures and restrictions
Construction schedules are weather dependent and subject to change
Please refer to COtrip.org for real-time travel conditions and to plan your trips!
