A major motor vehicle incident brought traffic to a standstill on I-10 eastbound near the John Ralston entrance ramp at 4:58 p.m. Sunday, March 29, 2026. Houston Fire Department responded to the scene in the Mercury/East End area, where the collision created significant backups during the evening commute period.
The crash occurred during a typically busy Sunday afternoon window when drivers heading toward the eastern suburbs and beyond converge on the Interstate 10 corridor. Commuters heading eastbound toward Channelview, Baytown, or points beyond faced substantial delays, with backup extending well past the Woodridge and Settegast neighborhoods. Drivers looking to avoid the congestion had options: the Hardy Toll Road provides a northbound alternative through Greens Bayou, while the feeder roads along I-10 offered surface-street routes, though those would likely fill with diverted traffic. Alternate routes like local streets through the East End or surface roads running parallel to the freeway became congested as drivers sought ways around the incident.
This stretch of I-10 eastbound near the John Ralston ramp serves as a critical gateway out of central Houston toward the refineries, petrochemical plants, and residential areas that dominate the region east of the city. The area sees heavy commuter traffic most days, particularly on weekends when travelers head to the beach or across to the Galveston area. Major interchanges and access points in this corridor feed traffic from downtown, Midtown, and the East End neighborhoods onto the main eastbound lanes.
The incident's major severity classification indicated it likely involved significant damage or injuries that required extended emergency response. Eastbound lanes were heavily impacted, with recovery time potentially extending into the evening hours. Drivers heading through Harris County on I-10 eastbound Sunday evening encountered delays well beyond the immediate incident site as traffic management crews worked to clear the roadway.
This wasn't the first crash at the location — 28 had been recorded in the previous 30 days.
In the 147 days since this incident, the location has seen 335 more crashes. Major-severity crashes accounted for 286 of those incidents.
The rate has held at a comparable level after this incident.
Three of those crashes fell within a single week.
That total ranks this location among the highest-incident corridors in the county.
Current through August 23, 2026.
IH10IB-MERCURY E IH 10 FWY @ JOHN RALSTON 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.