Police have identified a man who died in a single-vehicle crash in West Des Moines.

Authorities say 21-year-old Jeffrey Douglas Jones of Earlham was killed just before 6 a.m. Wednesday when his vehicle left the roadway on an interstate mix master that connects Interstates 80, 35 and 235. Police say Jones’ vehicle crossed several lanes of traffic and struck a concrete jersey barrier.

Jones was alone in the car. Authorities say they believe speed played a role in the crash. Jones was originally from Shellsburg. Authorities say they are still investigating.