A Canadian tourist heard the accident from a nearby hotel and ran out to help Covington, but could not resuscitate the rocker. The witness said he heard no screeches or attempts to brake.
Covington was not wearing a seatbelt at the time of the accident.
A drummer from a young age, Covington joined Jefferson Airplane full-time in 1970 after a year of playing with the band's blues-rock spin-off group, Hot Tuna.
The band, one of the first in the psychedelic rock movement, had already found success by the time Covington joined, having created hits like "White Rabbit" and "Somebody to Love" — both of which rank in Rolling Stone's 500 Greatest Songs of All Time.