There was one thing taxi driver Mark Farhad didn't do after an alleged hit-and-run that killed a 94-year-old woman on Sydney's lower north shore on Tuesday morning.

He didn't turn his GPS off.

Taxi driver and part-time lecturer Dr Mark Farhad.

Within hours, Dr Farhad's bosses at Taxis Combined had asked that he return to the depot to answer questions about the death of Suzanne King, who was hit and killed instantly as she slowly crossed the Pacific Highway at Crows Nest with her walking cane in one hand and shopping trolley in the other.

Dr Farhad, a part-time taxi driver and part-time lecturer at the University of Western Sydney's school of science and health, was granted strict conditional bail in Central Local Court on Wednesday.