Following a serious crash Saturday southwest of the city, a 24-year-old man is fighting for his life.

A large sport-type motorcycle was travelling westbound on Anderson Rd. S.W. overpass above Macleod Tr., just before 11 p.m., when the driver lost control and slid into the far north of the roadway, said police.

The motorcyclist was dislodged from the vehicle which continued to slide on the overpass for about 50 metres before it came to a stop.

The man was rushed to Foothills hospital with life-threatening injuries.

Investigators were at the scene for several hours. They're probing what speed the motorcycle was travelling on the wet roadway.