Car Accidents
Major US 75 Crash at FM 543 in McKinney Closes All Northbound Lanes

The information provided here is for educational purposes and does not constitute legal advice.
Wooley Law Takeaway
A major crash shut down the northbound main lanes of US 75 at FM 543/Weston Road in McKinney on Friday afternoon, September 4, 2026.
According to the traffic information provided, the collision was verified at approximately 3:55 p.m. The lane diagram shows all northbound main travel lanes and both shoulders closed, while the adjacent ramp remained open.
Early information did not identify the vehicles involved, confirm whether anyone was injured, or explain what caused the wreck.
All Northbound US 75 Lanes Closed at FM 543
The collision caused a major disruption to northbound traffic on US 75 near FM 543/Weston Road in north McKinney.
With the main lanes blocked, drivers traveling toward Melissa, Anna, Van Alstyne, and other communities north of McKinney could encounter heavy backups, emergency vehicles, and traffic being diverted toward frontage roads or available ramps.
This section of US 75 is one of the primary north-south routes through Collin County, carrying commuters, commercial vehicles, and regional traffic between McKinney and communities farther north.
Because information about the collision remains preliminary, it would be premature to attribute the wreck to speeding, distracted driving, following too closely, an unsafe lane change, or another particular cause.
Why Would All Northbound US 75 Lanes Be Closed?
When every main lane of a highway is closed after a collision, emergency personnel may need additional space to treat injured people, investigate the scene, remove damaged vehicles, or clear debris from the roadway.
A full closure can also be necessary when investigators need to document tire marks, vehicle positions, debris fields, or other physical evidence before traffic resumes.
The extent of the closure does not, by itself, establish how many people were injured or how the collision occurred.
Evidence After a Serious US 75 Crash in McKinney
A serious McKinney car accident on US 75 may require investigators to reconstruct the sequence of events leading to the collision.
Potentially important evidence may include:
TxDOT traffic-camera footage
Dashcam video
Nearby surveillance footage
McKinney police crash reports
Witness statements
Photographs and video from the scene
Vehicle event-data recorder information
Cell phone records when relevant
Vehicle damage patterns
Tire marks, roadway debris, and final vehicle positions
The Wooley Law Firm represents people injured in Texas car accidents, including serious crashes along US 75 throughout McKinney, Collin County, and North Texas.
US 75 Crashes in North McKinney Can Affect Regional Traffic
US 75 carries traffic from Dallas and Plano through Allen, McKinney, Melissa, and communities farther north.
Near FM 543, drivers may be entering or leaving the highway, changing lanes, or responding to congestion around interchanges and frontage-road connections.
After a serious wreck, investigators may need to determine whether traffic slowed unexpectedly, a vehicle changed lanes, one driver failed to maintain a safe following distance, or an initial impact caused a secondary collision.
The final position of the vehicles does not necessarily reveal how the crash began.
Injured in a US 75 Car Wreck in McKinney?
If you were injured in a McKinney car accident, US 75 wreck, FM 543 crash, Weston Road collision, or another serious Collin County highway accident, you may have the right to seek justice and pursue compensation if another driver or party was legally responsible.
A McKinney car accident lawyer can investigate traffic-camera footage, dashcam video, electronic vehicle data, witness statements, crash-scene evidence, and available insurance coverage to determine how the collision occurred.
Depending on the circumstances, an injured person may be able to pursue compensation for medical expenses, pain and suffering, lost wages, mental anguish, physical impairment, property damage, and other losses.
Call The Wooley Law Firm at (214) 699-6524 for a free consultation. You don’t pay unless we win.
This article is based on preliminary traffic information concerning a developing September 4, 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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The sooner you contact The Wooley Law Firm, PLLC, the sooner the firm can help you take legal action and seek compensation for your injuries. To schedule an initial consultation, call 214-699-6524 or contact the office via email.
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