Police in Howard County are investigating a motorcycle accident that left one man dead Sunday evening.

The crash happened on westbound MD Route 99 shortly after 6 p.m., when 45-year-old Gary Alan Lynch’s motorcycle left the roadway and hit a sign post.

The Woodbine, Md., man was taken to a local hospital, where he was pronounced dead, police said.

Police believe the fatal crash was a result of speeding. No other vehicles were involved.