A crash closed four lanes of the Dallas North Tollway in Far North Dallas Thursday morning.
The Texas Department of Public Safety said the crash was reported at about 10:45 a.m. after the driver of a tractor-trailer lost control of his vehicle and smashed into a concrete median.
The collision pushed the median into the southbound lanes where it was struck by an oncoming driver.
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DPS officials had no information on the condition of those involved in the crashes.
As of 3:40 p.m., two southbound and two northbound lanes of the DNT were closed at Belt Line Road.
It is not clear how long the highway may be closed; drivers are encouraged to avoid the area.
The crash is not related to another crash that occurred on the DNT earlier in the morning that also forced lane closures.