One man died after he was hit while riding his bicycle on King Avenue on Saturday night.
The incident happened around 11 p.m.
A 64-year-old man was riding the wrong way on the King Avenue West overpass near Mullowney Lane.
Billings Police Sergeant Brett Becker said the driver of the vehicle was cooperative during the investigation.
Police closed the road in both directions and reopened the area to traffic at 4:45 a.m.
The incident was the second fatal crash in Billings on Saturday as a Billings-area man died after he was struck by a car on Central Avenue around 8 p.m.