WILLARD, Box Elder County — A man was killed Tuesday when a vehicle rear-ended a semitrailer on I-15, police said.

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Investigators said evidence suggests the driver made no effort to slow down before slamming into the back of a semi about 5:15 p.m. No other details about the man were known Tuesday night.

Utah Highway Patrol Cpl. Todd Johnson said traffic had slowed and come to a stop because of an accident that had occurred less than 15 minutes earlier about a mile to the north. The semi was stopped in the left lane when it was rear-ended.

UHP Sgt. Brian Nelson said a witness directly behind the accident indicated there were no signs of impaired driving.

I-15 was shut down following the accident. The freeway reopened about 8 p.m.

McKenzie Romero

Twitter: @McKenzieRomero