Motorcyclist Adam Garrett Shields, 25, killed in collision with SUV on West Lake Mead Parkway in Henderson, Nevada

The eastbound lanes of West Lake Mead Parkway near Fiesta Henderson Road are expected to be closed until about 5:30 p.m., French said. The collision remains under investigation, and the SUV driver is cooperating with police, French said. The motorcyclist was traveling east on Lake Mead when he crashed into an SUV whose driver was heading west on Lake Mead and turning onto Industrial Park Road, French said. An initial investigation determined that the SUV driver failed to yield and that speed by the motorcyclist also appeared to be a factor in the crash, French said. Speed and failure to yield are being blamed for a crash Tuesday afternoon that left a motorcyclist dead, according to an initial police investigation.