The woman and three of her friends, all from Las Vegas, were riding single file on eastbound Pacific Coast Highway at about 5 p.m., according to Leslie Nichols, one of the bike riders. She said the riders, who were not wearing helmets, were at the intersection of Bayshore Drive and PCH when a Cadillac pulled up behind her friend, Amy Yancy, started honking and struck her.

"He was so impatient, he couldn't wait two seconds until the road curved into the cutaway," Nichols explained.