Memorial Parkway Overpass at Mastin Lake Road

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.

Region/County	North/Madison
Type of Work	Additional Lanes/Bridge Construction
Route	US-231/US-431
Projected Start	June 2023
Projected Completion	Fall 2026
Traffic Impact	Closure of shoulder and outside turn or acceleration lanes northbound and southbound,
Project Number	NH-001(610)
Project Cost	$33,978,345.00
Project Status	Active

Get the latest traffic information at algotraffic.com or on the ALGO Traffic app.

Sep 16, 2026

Northbound Memorial Parkway overpass at Mastin Lake Road open to traffic

The US-231/US-431 Memorial Parkway mainline and overpass at Mastin Lake Road opened to northbound traffic this afternoon.

ALDOT advises drivers to use caution and reduce speed. The area remains an active work zone, with construction of various features of the $34 million project still underway.

Southbound mainline, intersection to open later

Southbound traffic continues…

Sep 03, 2026

Traffic to change on Mastin Lake Road at North Memorial Parkway

Workers move alongside a paving train consisting of a paver, material transfer vehicle and dump trucks delivering asphalt.

Mastin Lake Road under the new overpass on North Memorial Parkway/US-231/US-431 in Huntsville will close for several weeks starting Friday, Sept. 4.

Following morning rush, both legs of Mastin Lake Road will be converted to allow right-in/right-out movements only.

ALDOT anticipates the intersection fully reopening in mid-October — after the new mainline opens to traffic…

Mar 04, 2026

Final bridge girders to be set on North Memorial Parkway overpass

An aerial view of the overpass construction on North Memorial Parkway at Mastin Lake Road in Huntsville. There is a visible gap in the overpass where girders will be installed to form the south span of the bridge.

Installation of the final bridge girders on the US-231/US-431/North Memorial Parkway overpass at Mastin Lake Road in Huntsville will take place over two nights, beginning this evening.

Bridgework subcontractor Miller & Miller will use cranes to raise a total of 12 girders — long, horizontal beams that will support the bridge deck — into place on the…

Sep 16, 2025

Expect late-night closure of North Memorial Parkway service road at Mastin Lake Road

A crane sits beside an incomplete bridge, the girders of which span a roadway.

Expect a temporary complete closure of the northbound US-231/US-431/North Memorial Parkway service road just north of Mastin Lake Road in Huntsville late tonight into early Wednesday morning.

The contractor will set six bridge girders for the north span of the overpass at Mastin Lake Road from 11 p.m. to 2 a.m. During that timeframe, all…

Aug 01, 2025

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

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.

The future North Memorial Parkway mainline north of Mastin Lake Road is almost ready for paving. Left turn…Read More “Left turn lanes from North Memorial Parkway to Mastin Lake Road reopen”

May 20, 2025

Expect late-night traffic interruptions on North Memorial Parkway

An aerial view of an intersection of two roads. The major route has a wide median area that is under construction for a new highway mianline. Bridge columns are being built near the intersection.

The Alabama Department of Transportation advises motorists to expect late-night traffic interruptions on US-231/US-431/North Memorial Parkway in Huntsville for overpass construction at Mastin Lake Road.

Intermittent traffic stoppages will take place from about 10 p.m. Wednesday, May 21, to 5 a.m. Thursday, May 22. For safety, workers will halt all traffic at the intersection for…

Dec 11, 2024

Left turns from Memorial Parkway to Mastin Lake Road to be closed for several months

The left turn lanes on North Memorial Parkway (US-231/US-431) at Mastin Lake Road in Huntsville will be closed for the safety of the traveling public during initial stages of the overpass bridge construction. ALDOT anticipates the closure remaining in place for several months.

The closure of the northbound and southbound left turn lanes on the…

Nov 19, 2024

Switch to North Memorial Parkway service roads postponed

The shifting of traffic from the North Memorial Parkway (US-231/US-431) mainline to the newly constructed service roads near Mastin Lake Road in Huntsville has been postponed.

Contractor Rogers Group originally planned to make the switch Wednesday, November 20. Traffic will possibly be moved Friday, November 22, instead, if weather permits. See Traffic to move to…

Nov 15, 2024

Traffic to move to new North Memorial Parkway service roads

An overhead view of traffic at an intersection, with the empty lanes of the service road visible beside the busy mainline.

Updated timeline: Switch to North Memorial Parkway service roads postponed

Traffic will move from the North Memorial Parkway (US-231/US-431) mainline to the newly constructed service roads near Mastin Lake Road in Huntsville next week, if weather permits.

Rogers Group, the contractor on the $34 million project, plans to begin shifting both northbound and southbound traffic…

Oct 18, 2024

Nighttime lane closures planned for Mastin Lake Road at North Memorial Parkway

An aerial view of the intersection. Fresh black asphalt can be seen on the recently-paved service roads.

Expect lane closures on Mastin Lake Road at North Memorial Parkway (US-231/US-431) in Huntsville on two upcoming nights.

Mastin Lake Road will be reduced to one lane in each direction from 8 p.m. Sunday to about 5 a.m. Monday and again from 8 p.m. Monday to about 5 a.m. Tuesday.

The intersection is the focus…