18-wheeler crash blocks Interstate 35 access road on San Antonio’s Northeast Side, disrupting ramp traffic

What happened and where traffic was affected

An 18-wheeler crash blocked part of the Interstate 35 roadway network on San Antonio’s Northeast Side, forcing traffic restrictions that affected an access road connection and at least one key ramp movement between I-35 and Loop 410. The incident occurred on the I-35 overpass near Binz-Engleman Road, a corridor that carries heavy daily commuter and commercial traffic.

Transportation officials reported that the Loop 410 to I-35 southbound exit ramp was closed while crews worked the scene. By late afternoon on March 8, 2026, the ramp had reopened and lanes were reported cleared.

Scene conditions and what remains unknown

Video and camera images from the area showed the 18-wheeler involved on the overpass, with debris visible near the roadway. Observations at the scene indicated the truck appeared to have struck a guardrail.

As of the latest official updates available, the cause of the crash had not been released publicly, and it was not confirmed whether injuries occurred. Authorities indicated they were seeking additional details from first responders, but no verified information on medical transport or the driver’s condition had been made public at the time the ramp reopened.

Why access-road crashes can snarl traffic quickly

Crashes involving heavy trucks on access roads, connector ramps, and overpasses often have outsized impacts on mobility compared with incidents on straight main lanes. When a crash occurs on an elevated segment, clearing operations can be more complex because crews must manage debris, damaged barriers, and the need to keep vehicles and responders protected in a constrained space.

Even when the main lanes of I-35 remain passable, closure of a single ramp or access-road segment can trigger rapid backups as drivers are forced into fewer merging points and detour routes.

• Closed ramps can shift congestion onto frontage roads and adjacent arterials.
• Large trucks may require specialized towing and recovery, extending closure times.
• Debris and guardrail strikes can necessitate additional safety checks before reopening.

What drivers can do during similar closures

During ramp or access-road shutdowns, transportation agencies typically advise motorists to expect delays and choose alternate routes when possible. For drivers already approaching a closure, the most effective immediate steps are to follow posted detours, avoid unsafe lane changes near merge points, and allow additional following distance in stop-and-go traffic conditions.

Authorities reopened the affected ramp after crews cleared lanes and removed debris, but the underlying cause of the crash had not been confirmed publicly as of the reopening.

This story may be updated as additional verified details are released by officials.