The accident occurred early on Friday morning, local police say
The senior Awami League leader was buried at the Banani Graveyard in Dhaka on Sunday evening.
A police team accorded her Guard of Honour.
Zohra had breathed her last on Friday while undergoing treatment at Dhaka's United Hospital. She was 80.
She had assumed the Awami League's helm at turbulent times after the assassination of the nation’s architect Bangabandhu Sheikh Mujibur Rahman.
After leading the party from the front as its convenor, she handed it over to Bangabandhu's daughter Sheikh Hasina after the latter returned home several years later.
Zohra and Tajuddin Ahmed had tied the knot in 1959.