It happened around 3am on the freeway near FM 2351. Police say the man and a passenger were pushing the vehicle in a construction zone, when another driver who apparently couldn't see the pair didn't stop before it was too late.
The driver of the stranded vehicle was hit and died at the scene. His passenger was not hurt.
The other driver did stop and waited for authorities to arrive.
All southbound lanes were shut down for several hours due to the investigation. All lanes have since reopened.
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