Skip to content
ALDOT News Hub

Left turn lanes from North Memorial Parkway to Mastin Lake Road reopen

Signals positioned under the overpass govern the left turn lanes from North Memorial Parkway to Mastin Lake Road.
Aug 01

The left turn lanes from the US-231/US-431/North Memorial Parkway service roads to Mastin Lake Road reopened today.

The northbound and southbound turn lanes closed in December for construction of the parkway overpass at Mastin Lake Road.

A construction site with a road roller in the foreground and a dump truck and an excavator visible in the background.
The future North Memorial Parkway mainline north of Mastin Lake Road is almost ready for paving.

Left turn lanes open

Following installation of all bridge girders on the central span over the intersection and necessary modifications to turn lanes, concrete islands and traffic signals, left turns are again permissible.

Signals positioned under the partially-constructed overpass govern left turns from the service roads. Left turns may only be made from the designated turn lanes; left turns from the through lanes remain prohibited.

A mechanically-stabilized earth wall.
A mechanically stabilized earth retaining wall north of the intersection will support the elevated mainline of North Memorial Parkway.
Workers work with rebar atop a bridge abutment and mechanically stabilized earth retaining wall.
Workers prepare steel that will reinforce the back wall of the north bridge abutment.

Ongoing construction

ALDOT advises motorists to exercise caution at the intersection due to ongoing construction of the overpass and four-lane mainline.

Temporary closures of the turn or through lanes will occasionally be necessary. Typically, those closures will be limited to non-peak travel hours.

An excavator with a row of pilings and a group of men in yellow vests having a discussion visible in background
Steel piles for the south bridge abutment.

For real-time traffic and road condition information, visit ALGOtraffic.com or download the ALGO Traffic app.

ALDOT currently anticipates contractor Rogers Group completing the $34 million project in late spring or early summer of 2026.

Related Project
Region/County North/Madison
Type of WorkAdditional Lanes/Bridge Construction
RouteUS-231/US-431
Projected StartJune 2023
Projected CompletionSummer 2026
Traffic ImpactClosure of shoulder and outside turn or acceleration lanes northbound and southbound,

This project will construct additional lanes on US-231/US-431/North Memorial Parkway from south of the intersection of Mastin Lake Road to the intersection of Winchester Road in Huntsville, including a mainline overpass and access roads at Mastin Lake Road.

Read More “Memorial Parkway Overpass at Mastin Lake Road”