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Phoenix, AZ (July 23, 2026) – A serious crash caused delays for northbound drivers on Interstate 17 near Thunderbird Road in north Phoenix early on Wednesday morning, July 22. The collision happened around 4:30 a.m. during the morning commute.
The crash blocked nearly the entire northbound freeway while crews worked to move vehicles to the shoulder and remove them from the roadway. Details about the vehicles involved and any injuries were not immediately available.
Traffic backed up for several miles before the freeway fully reopened around 6 a.m. Authorities continue to investigate the cause of the crash, and more details will be released as soon as they become available.
We are thinking of those injured as they receive medical care.
How Freeway Crashes Can Cause Major Delays
Crashes on busy freeways can quickly affect traffic because multiple lanes may need to be closed for emergency response and vehicle removal. Even after a crash scene is cleared, congestion can continue as drivers return to normal speeds.
Investigators may review vehicle positions, roadway conditions, and available evidence to understand how a freeway crash occurred. Early morning collisions can also involve factors such as visibility, traffic volume, and driver reaction time.
