Harris County, TX — Jun 21, 2024, Luis Diaz Sardinas and another person were injured in a car accident at approximately 2:45 p.m. along Grand Parkway.
According to authorities, 24-year-old Luis Sardinas was traveling in a northbound Honda Civic on the Grand Parkway feeder road at the Colonial Parkway intersection when the accident took place.

The intersection is controlled by a traffic signal. The Civic apparently had a green light as it entered the intersection. Officials indicate that, for as yet unknown reasons, an eastbound Ford Edge occupied by a 51-year-old woman and a 54-year-old passenger entered the intersection at an apparently unsafe time, failing to heed the red light given by the traffic signal. A T-bone collision consequently occurred between the front-end of the Edge and the left side of the Civic.
Both Sardinas and the woman who had been behind the wheel of the Edge reportedly sustained serious injuries over the course of the accident; they were each transported to local medical facilities by EMS in order to receive necessary treatment. Additional details pertaining to this incident are not available at this point in time.
Commentary by Attorney Michael Grossman
When a crash happens in a signal-controlled intersection and both drivers are seriously hurt, it’s easy for stories to get tangled. But some cases offer rare clarity about who had the right of way—and when that happens, it sharpens the focus on the other unanswered questions.
Did the authorities thoroughly investigate the crash?
Knowing which driver had the green light is a critical starting point, but it’s not the whole picture. Investigators still need to determine how fast the vehicles were traveling, whether either of them attempted to brake or swerve, and what happened in the seconds before the crash. A full reconstruction would show whether the Civic had time to react or whether the Ford’s entry into the intersection left no room for avoidance. That kind of detail makes a real difference when trying to understand liability.
Has anyone looked into the possibility that a vehicle defect caused the crash?
A red-light violation might look like pure driver error, but mechanical failure can’t be ruled out without a thorough inspection. If the Ford Edge had faulty brakes or its driver-assist systems didn’t engage, that could explain why it entered the intersection unsafely. And depending on how the impact unfolded, the Civic’s response systems—airbags, crash mitigation features—should also be examined to see if they functioned properly.
Has all the electronic data relating to the crash been collected?
With questions of timing and impact severity in play, data from the Civic and Edge can reveal critical facts—vehicle speed, braking input, throttle use, and more. Nearby traffic cameras may have captured the moment of impact, offering visual confirmation that supports the rest of the evidence. If that information was gathered quickly and handled properly, the answers are likely already available.
Having the light is important—but proving what each driver did in that moment matters just as much. In any crash involving serious injuries, assumptions aren’t enough. Real answers require real evidence.
Takeaways:
- Even when fault seems clear, investigators should fully reconstruct vehicle paths and driver actions.
- A mechanical issue may have contributed to the red-light violation or the severity of the crash.
- Vehicle data and camera footage are essential tools for confirming what happened and why.

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