A major crash shut down the entrance ramp from Post Oak Road to US 90A westbound early Saturday morning, with the collision occurring at 2:48 AM on April 04, 2026. Houston Police Department responded to the scene in the southwest Harris County area. No fatalities were reported, though the incident was classified as major and created significant traffic disruptions during the pre-dawn hours.
The early-morning timing limited immediate commuter impact, but the severity of the crash tied up westbound US 90A for several hours. Drivers heading toward the Southwest Freeway corridor during the Saturday morning commute faced delays, with traffic backing up onto connecting roads including the Post Oak area itself. The alternative westbound route via the feeder roads or a detour through nearby surface streets became the best option for drivers trying to reach the Medical Center, Bellaire, or points west toward Sugar Land and beyond.
This stretch of US 90A at the Post Oak entrance ramp has been a persistent trouble spot throughout Harris County. Over the past 30 days alone, the location logged 32 total incidents, with 15 classified as major. The corridor's combination of high-speed freeway traffic, tight merging geometry, and heavy weekend activity—particularly near the Medical Center and shopping areas—creates recurring collision scenarios that have plagued this particular ramp entrance.
The westbound direction bore the brunt of Saturday's incident, with lanes remaining closed well into the morning as HPD cleared the scene and debris removal continued. Drivers were advised to monitor traffic reports before heading out, as backups extended considerably during the peak weekend travel period. The ramp's critical role in routing traffic between Post Oak and westbound US 90A meant that even a single major incident created a cascade effect across the southwest Houston corridor.
This location had logged 24 crashes in the month before this incident occurred.
108 more crashes have been documented at this location since this incident. 82 of those were classified as major. 1 of those that followed this incident was fatal.
The location has logged crashes at a higher rate after this one.
Some of those crashes occurred within days of each other.
The full count places this location among the top crash sites in the county.
Through May 28, 2026.
US90AOB-S POST OAK RD 12398 US 90A FWY @ POST OAK ENTR RAMP
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.