From ABC4 News:

“The car in front of us slowed down,” recalled [witness Marchelle] Elmer, “we slowed down. . . .” Then trouble comes around the bend. “This Land Rover came flying past us and started pushing the elk down [the highway]. . . .

Most of the elk ran down the road.  Six. . .  [jumped] over the railing. . . plunging down onto the lanes below.  Those six died.