A car driven onto South Bank's boardwalk last month has been left abandoned as authorities struggle to determine who is responsible for its removal.

On January 16, police apprehended a woman, who was allegedly drunk, driving her white Mitsubishi Magna along the busy riverside walkway.

A car driven onto the South Bank boardwalk on January 16 has not been removed. Credit:Anna Levy

Police moved the car into a nearby driveway opposite the Cultural Centre pontoon. Almost two weeks later, it was still there.

The car's number plates had been removed, with a police sticker on its windscreen, and it appeared to be filled with rubbish and beer bottles.