This project is a design/build program implemented through the GA Department of Transportation. The project reconfigures the existing conventional diamond interchange at CR 209/Riverside Drive and I-285 by replacing the traffic signal at each of the ramp terminal with single lane roundabouts to improve the safety of the interchange.
To learn more about roundabouts, visit http://www.dot.ga.gov/DS/SafetyOperation/Roundabouts
(Scroll down for latest updates)
Jan 28, 2016 - Press Release Issued:
The Georgia Department of Transportation will begin a safety enhancement project in Sandy Springs on Monday, February 1; weather permitting.
Currently, Riverside Drive at I-285 consists of one twelve-foot lane in both directions with no turn lanes and traffic signals at the entrance and exit ramps. The existing configuration causes vehicles to block traffic traveling through the intersection.
Georgia DOT’s contractor Baldwin Paving Company will build roundabouts at both ramp intersections of the I-285 interchange at Riverside Drive.
The newly designed $5.6 million interchange will convert the existing signalized ramp intersections to single lane roundabouts. Two lanes will feed into the roundabout with one lane used to enter the roundabout and one lane used as a right turn lane. The project also includes sidewalks on both sides of Riverside Drive and bridge maintenance on the existing Riverside Drive Bridge over I-285.
“Crash data from 2008 through 2012 showed 73 crashes occurred at the Riverside Drive and I-285 intersection. Sixteen of those crashes caused injuries,” said Kathy Zahul, Metro District-District Engineer. “Roundabouts improve safety more than other types of intersections because speeds within the intersection are slower, giving drivers more time to react. There are also fewer conflict points, particularly for pedestrians.”
Construction will take place both day and night however; lane closures will only take place during weeknights from 9 p.m., until 5 a.m., and on the weekends from 8:00 p.m. until 10:00 a.m. One travel lane will remain open at all times, except during bridge maintenance work when all lanes in each direction will close and a detour will be in place. Motorists should exercise caution and slow down while driving through the work zone. Construction crews and equipment will be in close proximity to the roads.
Construction is scheduled to be complete in November 2016.
GDOT posted a video as a demonstration of how the roundabouts will work.
March 29, 2016 - GDOT provided an updated concept image (below)
March 30, 2016 - Construction Notice to Proceed Issued. Substantial completion date for this project listed as November 1, 2016.
June 1, 2016 - GDOT issued an updated drawing for the project.
I-285 Ramps at Riverside Drive
June 20, 2016 - GDOT issued the following press release:
Riverside Drive Roundabouts at I-285 Rendering Available to Public
The Georgia Department of Transportation released a new rendering of the roundabouts under construction at the I-285 and Riverside Drive ramp intersections.
Georgia DOT’s Design-Build Team, Baldwin Paving Company, Inc. & Infrastructure Consulting & Engineering, has completed the design and has been relocating utilities since February 2016 with plans for major construction to begin this summer.
“Residents and commuters who travel on Riverside Drive can view an up-to-date rendering of the roundabout project,” said Marlo Clowers GDOT Project Manager. “The project is on schedule and is expected to be complete November 2016, weather permitting. The City of Sandy Springs has contributed funding for landscaping and decorative lighting on the project.”
Baldwin Paving Company is constructing roundabouts at both ramp intersections of the I-285 interchange at Riverside Drive. The existing configuration consists of one, twelve foot lane in both directions and traffic signals at the ramp termini. The signalized intersections will be converted into single lane roundabouts, one at each intersection.
Each approach to the roundabout will be widened to two lanes, one used to enter the roundabout and one used as a right turn lane. The project also includes added sidewalks to both sides of the roadway along Riverside Drive and routine maintenance of the existing bridge over I-285.
Construction will take place both day and night. However, lane closures will only be in place on weeknights from 9 p.m. until 5 a.m. and weekends from 8 p.m. until 10 a.m. One travel lane will remain open at all times except during bridge maintenance work. At this point, all lanes in each direction will close and a detour will be used.
Motorists should exercise caution and slow down while driving through the work zone. Construction crews and equipment will be in close proximity to the roads until the construction for the project ends in November 2016 and the landscaping warranty period for the roundabout project ends in May 2018.
July 22, 2016 - GDOT issued the following press release:
Construction to Require Weeknight Closures on Riverside Drive
Weather permitting; Georgia Department of Transportation contractors will close one lane on
Riverside Drive. The closure will allow crews to continue construction on the I-285 at Riverside
9 p.m., Sunday, July 24 until 5 a.m., Monday, July 25
9 p.m., Monday, July 25 until 5 a.m., Tuesday, July 26
9 p.m., Tuesday, July 26 until 5 a.m., Wednesday, July 27
9 p.m., Wednesday, July 27 until 5 a.m., Thursday, July 28
9 p.m., Thursday July 28 until 5 a.m., Friday, July 29
Riverside Drive from Cold Stream Court to Fair Oaks Manor
Motorists are cautioned to reduce their speed while traveling through work zones, pay attention and watch for workers. Before heading out, get real-time information on work status and traffic conditions. Call 511, visit 511ga.org , or download the Georgia 511 app.