One person was killed and two others were injured in a single-vehicle crash in Campbell County early Friday morning, the Wyoming Highway Patrol says.

The crash happened around 12 a.m. at milepost 142.8 on Interstate 90, about 17 miles east of Gillette.

Wyoming Highway Patrol
Wyoming Highway Patrol
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According to a fatality crash summary, a Toyota was headed east when the driver fell asleep, causing the vehicle to veer off the right side of the interstate.

"The Toyota subsequently encountered a water-filled ditch, where it collided with the far side of the ditch, and finally came to a stop beyond the ditch," the summary reads.

A passenger in the vehicle, 79-year-old China resident Haigui Sun, was not wearing a seat belt and died from their injuries.

The driver and another passenger were also reportedly injured in the crash, but the summary did not say to what extent.

This is the second fatality at milepost 142.8 on I-90 this month -- 18-year-old Wyoming resident Ayden Kniffen was killed in a rollover crash there on July 2 -- and the fourth fatality on I-90 so far this year.

2022's Deadliest Wyoming County by Traffic Deaths

While car crashes can occur anywhere, some roads in Wyoming are more dangerous than others.

According to Wyoming Highway Patrol data, there were 117 fatal crashes in the Cowboy State in 2022 resulting in 133 deaths.

Of those fatal crashes, the majority (13.68%) occurred in Laramie County -- two in January, one in February, one in March, two in April, one in June, two in July, three in August, two in September, one in November, and one in December.

Sweetwater County saw the second most fatal crashes last year, 12, while Fremont and Lincoln counties each saw 10.

Albany and Park counties each recorded eight, and Campbell, Converse, and Natrona counties each tallied seven.

The deadliest 2022 crash in Laramie County took place on June 17 when two semis collided on Interstate 80 east of Cheyenne and immediately became engulfed in flames killing both drivers and a passenger.

Laramie County also saw two fatal crashes involving motorcyclists, two fatal crashes involving juveniles, and a fatal crash involving a pedestrian last year.

Below is the Wyoming Highway Patrol narrative of every fatal crash that occurred in Laramie County in 2022.