Westbound Interstate 80 is back open in Sparks Friday morning because of a wrong-way crash involving a NHP trooper. It happened near Rock Boulevard at about 2:00.

The wrong-way driver has been identified as Mason Alan Johnston, 19, of Loyalton, California and troopers say impairment is suspected.

NHP says preliminary investigation shows Johnston's 1966 Chevrolet pickup truck entered westbound I-80 at Robb Drive and was traveling in the fast lane.

Investigators say the Johnston hit the NHP trooper near Rock Blvd. and kept going, hitting a big rig near the Pyramid Way off-ramp. The driver continued going east in the westbound lanes, eventually stopping in the median east of Pyramid.

Johnston was arrested and charged with driving under the influence causing substantial bodily harm, minor in consumption, duty to stop at the scene of a crash involving injury, reckless driving, and driving on right half of road required.

The NHP trooper involved was taken to the hospital with non-life threatening injuries. The big rig driver was not hurt.

Westbound I-80 was closed near Rock Blvd and was diverted onto the Rock Boulevard off-ramp.

The NHP is asking anyone with information on this crash to contact, the Nevada Highway Patrol Multi-Disciplinary Investigation and Reconstruction Team (M.I.R.T.) at

and reference NHP Case #190901036.

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