All mainlanes on SH-99 northbound at the San Jacinto River near Lanier/Grand Parkway are blocked following a crash early Sunday morning, October 25, 2026 at 1:29 AM, according to Houston TranStar traffic monitoring.
The incident brought all through-lanes to a standstill in the early morning hours. Crews worked to clear the roadway.
SH-99 corridor data from LocalTrafficAccidents.com shows crashes remain the most common incident type in this area over the past 90 days. Harris County recorded 11,928 total incidents in the past 30 days across all roadways, including 4 fatalities.
Update (3:30 AM CT): As of 3:30 AM CT, the scene remains active and lanes may still be affected. Motorists are advised to seek alternate routes.
SH-99 Lanier/Grand Pkwy - North Eastbound at San Jacinto River
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.