THE I-35 is Closed Due to a Multi-Vehicle Wreck: In early March 2026, several major incidents caused severe traffic disruptions along Interstate 35 (I-35), one of the most important highways in the United States. Multiple multi-vehicle crashes involving semi-trucks and passenger vehicles forced authorities to close sections of the interstate in Texas cities such as Austin, San Antonio, and Fort Worth.
The closures created massive traffic delays, detours, and emergency responses, highlighting the risks of heavy highway traffic and the importance of driver safety. Below is a full overview of the I-35 crash events, affected areas, and safety recommendations for motorists.
1. Major I-35 Crash Closures Reported in March 2026
Several serious accidents occurred along different stretches of I-35, forcing authorities to temporarily shut down lanes.
Austin: I-35 Northbound Closed Near Slaughter Lane
One of the most significant incidents occurred in South Austin near Slaughter Lane, where a multi-vehicle crash involving a semi-truck forced officials to close all northbound lanes of I-35.
Key details include:
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All lanes closed near Exit 226
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Traffic detoured to Onion Creek Parkway
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Emergency crews responded to clear damaged vehicles
Drivers were urged to avoid the area and expect long delays while crews worked to reopen the roadway.
San Antonio Area: 18-Wheeler Rollover
Another crash occurred near New Laredo Highway, where an 18-wheeler rollover accident shut down southbound lanes of I-35.
The accident caused:
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heavy traffic congestion
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delays for freight transport
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emergency lane closures for investigation and cleanup
2. Additional I-35 Traffic Incidents
Multiple additional accidents contributed to widespread disruption along the interstate.
Crash and Vehicle Fire Near Covell Road
Reports also indicated a semi-truck and passenger vehicle collision followed by a vehicle fire near Covell Road, which forced authorities to close southbound lanes temporarily.
Fire crews and emergency responders worked to:
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extinguish the flames
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remove damaged vehicles
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inspect the roadway for hazards
Fort Worth Area Crash on I-35W
In Fort Worth, a serious multi-vehicle crash on I-35W near Ripy Street forced a complete shutdown of northbound lanes.
This crash involved:
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multiple passenger vehicles
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emergency medical response
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temporary traffic redirection
These incidents collectively caused significant disruption across the I-35 corridor.
3. Why I-35 Accidents Are Common
Interstate 35 is one of the busiest highways in Texas and the United States, which increases the likelihood of accidents.
Heavy Commercial Truck Traffic
I-35 serves as a major freight corridor connecting:
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Mexico
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Texas
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Midwestern states
Large volumes of 18-wheelers and freight trucks share the road with daily commuters.
High Traffic Volume in Major Cities
Cities such as Austin, Dallas, and San Antonio experience extremely heavy traffic during peak hours.
This congestion increases the risk of:
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rear-end collisions
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multi-vehicle pileups
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rollover crashes involving large trucks
4. Traffic Detours and Driver Impact
When sections of I-35 close, authorities implement detours to keep traffic moving.
Austin Detour Routes
Drivers traveling northbound near Slaughter Lane were redirected through:
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Exit 226
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Onion Creek Parkway
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nearby local roadways
These detours helped reduce congestion while emergency crews worked at the crash site.
Regional Traffic Delays
Because I-35 is a major interstate route, closures can affect traffic for miles.
Drivers may experience:
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delays lasting several hours
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increased traffic on nearby highways
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congestion on local streets
Transportation agencies recommend checking real-time traffic updates before traveling.
5. Emergency Response and Investigation
After major crashes, multiple agencies typically respond to the scene.
First Responders and Cleanup Crews
Emergency response teams often include:
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local police departments
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firefighters
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EMS units
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highway maintenance crews
Their priority is to:
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assist injured individuals
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clear debris
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restore safe driving conditions
Accident Investigations
Authorities may also investigate crashes to determine causes such as:
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driver error
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speeding
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mechanical failure
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hazardous weather conditions
These investigations help improve future highway safety measures.
6. Safety Tips for Drivers on I-35
With heavy traffic and frequent freight vehicles, drivers should take extra precautions.
Maintain Safe Following Distance
One of the main causes of multi-vehicle accidents is tailgating. Drivers should keep a safe distance, especially near large trucks.
Stay Updated on Traffic Alerts
Before traveling, check traffic conditions through:
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traffic apps
Real-time updates can help drivers avoid accident zones and road closures.
Drive Carefully Near Large Trucks
When sharing the road with 18-wheelers, remember that trucks require:
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longer stopping distances
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wider turning space
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larger blind spots
Being aware of these factors helps prevent accidents.
Conclusion
The I-35 closures in March 2026 caused significant disruptions across Texas due to multi-vehicle crashes involving semi-trucks and passenger vehicles. Major incidents near Slaughter Lane in Austin, New Laredo Highway in San Antonio, and I-35W in Fort Worth forced authorities to temporarily shut down sections of the interstate.
These events highlight the challenges of managing traffic on one of the busiest transportation corridors in the United States. By staying informed about traffic updates and practicing safe driving habits, motorists can help reduce accidents and keep highways like I-35 safer for everyone.
