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Vol. XXVIII • No. 19
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ALDOT’s $34M Memorial Parkway Expansion in Final Stretch
Crews in Madison County, Alabama, are in the final stretch of a project that will add additional lanes on U.S.-231/U.S.-431/North Memorial Parkway from south of the intersection of Mastin Lake Road to the intersection of Winchester Road in Huntsville. The $34 million effort includes construction of a mainline overpass and access roads. “Memorial Parkway carries about 40,000 vehicles a day near Mastin Lake Road,” Alabama Department of Transportation (ALDOT) north region communications coordinator, Seth Burkett told Construction Equipment Guide. “The city street is busy, particularly on its western leg, which carries about 18,000 vehicles daily. “U.S./231/U.S.-431 is a major route for commuters from communities such as Meridianville, Hazel Green and Fayetteville, Tenn. Traffic is generated by several major retailers, as well as a few restaurants and other businesses near the intersection.” Burkett said while the project will increase the number of lanes on U.S.-231/U.S.-431/North Memorial Parkway from four/five to eight lanes (four-lane mainline with a pair of one-way, two-lane frontage roads), it’s more about creating a grade separation to move traffic more efficiently. “The mainline overpass at the intersection with Mastin Lake Road will eliminate delays for northbound and southbound through-traffic, which are the primary movements. Separating most of the through-traffic from the intersection will greatly improve the functionality of the intersection for the remaining movements.” The project will address vehicles merging and diverging close to a busy, signalized intersection.
Cindy Riley
CEG CORRESPONDENT
ALDOT photo
Construction has been going well, with the overpass bridge recently completed.
“Prior to the project, the Memorial Parkway expressway and frontage roads ended/began about 600 feet south of Mastin Lake Road, with one lane dropping from the northbound service road and the other merging with the mainline as it approached the intersection,” said Burkett. “This third northbound lane carried through the intersection to Stallworth Road at Alabama A&M University.” During construction, temporary through-lane closures have caused a number of traffic delays. There also were periods when longer term closures of some turn lanes or
auxiliary lanes were necessary, prompting some drivers to take alternate routes. Two main operations were conducted under nighttime lane closures, as they could have severely impacted traffic otherwise. This included paving on Mastin Lake Road to match the grade with the new service roads and setting bridge girders for the new overpass. The work forced traffic stoppages while cranes carefully lifted the large prestressed concrete beams into place. see PARKWAY page 6
Blount County Roundabout Project Receives Safety Award
ALDOT photo
ALDOT was one of 12 winners from nine different states in the SASHTO region.
On Aug. 28, 2026, the Southern Association of State Highway and Transportation Officials (SASHTO) recognized the Alabama Department of Transportation (ALDOT) with its first America’s Transportation Award. The new triple roundabout on SR-160 in Hayden received regional honors for Small Project in the Safety category. The $8.6 million safety upgrade installed three roundabouts at the
busy SR-160 intersection with I-65 in Blount County. It was designed to help reduce the number of wrongway wrecks at Exit 234 ramps. Sain Associates created the design while Vulcan Materials Asphalt and Construction served as the prime contractor and Neel-Schaffer provided consulting. Pre-construction data showed there were 56 crashes in three years at the short stretch of SR-160, eight with injuries.
Following its completion in the summer of 2025, ALDOT crash statistics showed a 50 percent reduction in crashes per month by the end of the year, with no injuries through the project area. “There’s no doubt in my mind that without the roundabouts there, we would have already had a fatality at this intersection,” Hayden Police Chief James Chapman said in late 2025. see AWARD page 2