A major crash occurred on US-90 Alternate Eastbound at S. Post Oak at 7:11 AM on Tuesday, May 12, 2026, disrupting morning traffic in Harris County.
The incident struck during a peak crash window for the corridor. According to LTA data, the 7 AM–8 AM hour has generated eight crashes over the past 90 days at this location—the highest concentration of any single-hour period. Tuesday's collision is the latest in a pattern of repeated incidents that has made this stretch a persistent flash point for crashes.
The corridor's 30-day incident count stands at 22, placing it in the extreme category. Over the past 90 days, the location has recorded 65 total incidents, including 25 major crashes. In the past 12 months, 71 incidents have occurred here, with 31 classified as major. The data reflects a location where crashes cluster with statistical regularity, regardless of season or traffic volume variation.
While 36 percent of crashes at this location historically occur during rush hour periods, the dominant incident pattern is actually offpeak—meaning the corridor produces collisions throughout the day and evening. Wednesday is the highest-incident day of the week at this location, with 11 crashes recorded over 90 days.
Weather conditions at the time of the Tuesday incident were clear, with temperatures at 76°F.
Harris County recorded 19,041 total incidents over the past 30 days, including 30 fatalities. The US-90 Alternate corridor at S. Post Oak represents a concentrated pocket of crash activity within a broader county pattern that continues to produce significant incidents daily.
The location remains open to traffic, though conditions in the immediate area should be monitored for residual congestion or debris. The specific cause of Tuesday's crash has not been determined.
Update (10:05 AM CT): The major crash at US-90 Alternate Eastbound at S. Post Oak, first reported at 7:11 AM, has cleared after approximately 2 hours and 54 minutes. All lanes have reopened and normal traffic flow has resumed in the area.
Sources: TxDOT Crash Records Information System and Local Traffic Accidents database. Counts through September 12, 2026.
The location had seen 20 crashes in the 30 days leading up to this incident.
In the period since this crash, 98 additional incidents have occurred here. 24 of the crashes that followed were major.
The location has logged crashes at a higher rate after this one.
Multiple crashes occurred at this location within a tight time window.
Together, the incidents make this stretch one of the most active in the county.
Data current as of September 04, 2026.
US-90 Alternate Eastbound at S. Post Oak
Harris County, Texas
This report was produced by LTA's editor-designed production system under the executive editorial direction of Dennis R. Mundy, Executive Editor. The system combines our proprietary data pipeline with AI-assisted drafting to deliver verified incident coverage to LTA's editorial standards.