Car Accidents
Major Wreck on Northbound I-35W at FM 1171 in Northlake

The information provided here is for educational purposes and does not constitute legal advice.
Wooley Law Takeaway
A major wreck was reported on northbound I-35W at FM 1171 in Northlake during the Wednesday afternoon commute on September 16, 2026.
According to the traffic information provided, the collision was reported at approximately 4:20 p.m. The crash caused a significant roadway blockage, with only the right shoulder remaining open while emergency crews responded.
Early information did not identify the vehicles involved, confirm whether anyone was injured, or explain what caused the collision.
Major I-35W Crash Blocks Nearly All Northbound Lanes
The wreck occurred near the interchange of I-35W and FM 1171/Cross Timbers Road in Denton County. FM 1171 meets I-35W in Northlake before continuing east through Flower Mound and Lewisville.
With nearly the entire northbound roadway blocked, drivers approaching the scene could encounter substantial congestion, sudden braking, emergency vehicles, and motorists attempting to move onto the shoulder or toward alternate routes.
Because information about the crash remains preliminary, it would be premature to determine whether speeding, distracted driving, following too closely, an unsafe lane change, traffic congestion, or another factor contributed to the wreck.
I-35W and FM 1171 Have Seen Serious Traffic Incidents Before
The I-35W/FM 1171 interchange has been the site of other major traffic incidents.
In August 2025, an 18-wheeler struck the FM 1171 bridge over I-35W in Northlake, forcing a lengthy closure while crews responded and TxDOT inspected the bridge. That incident was separate from Wednesday's crash and is not known to be related.
The Wooley Law Firm has also reported on other recent serious crashes along I-35W throughout North Texas, including wrecks in Fort Worth, Burleson, and near Alvarado.
Evidence After a Major Highway Collision
When a wreck closes most of an interstate, investigators may need to reconstruct how the collision occurred and what each vehicle was doing before impact.
Potentially important evidence can include:
TxDOT traffic-camera footage;
dashcam recordings;
nearby surveillance video;
photographs and videos from the crash scene;
police crash reports;
witness statements;
vehicle event-data recorder information;
cell phone records when relevant;
roadway debris and tire marks; and
the final positions and damage patterns of the vehicles.
Video evidence can be particularly important when a collision occurs on a high-speed interstate because it may show lane changes, braking, congestion, or the sequence of impacts.
Injured in an I-35W Wreck in North Texas?
The Wooley Law Firm represents people injured in serious car, truck, and commercial vehicle crashes throughout Dallas-Fort Worth and North Texas.
If you were injured in a crash on I-35W, FM 1171, or another Denton County highway, an investigation may include obtaining traffic-camera video, dashcam footage, vehicle data, witness statements, insurance information, and other evidence needed to determine how the collision occurred.
Call The Wooley Law Firm at (214) 699-6524 for a free consultation. You don't pay unless we win.
Disclaimer
This article is based on preliminary traffic information concerning a developing September 16, 2026 collision. Additional or different facts may become available. Nothing in this article is intended to assign fault to any driver, person, company, or other entity before the investigation is complete.
This article is for general informational purposes only and is not legal advice. Reading it does not create an attorney-client relationship.
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