Rakhi, 39, from Vyasapuram, Palluruthy, died on Saturday night after the motorcycle on which she was travelling fell into a ditch near the Cochin Shipyard.
According to the police, the vehicle driven by her husband Jayaprasad fell into the ditch on MG Road and Rakhi, the pillion rider, was thrown off the bike.
She fell on to the road before a KSRTC bus, which ran over her. The accident occurred around 8.45 p.m., the police said.
The large ditch on the busy MG Road was formed more than two months ago, said a police official. The spot has been the scene of several road accidents.