A childcare worker whose "singular error" allegedly caused a horrific crash, killing a pregnant woman and her unborn child, has been granted release on bail.

Samanvidha Dhareshwar, 33, was walking with her husband and a child in northern Sydney when struck by a station wagon on November 14.

The crash in Hornsby was allegedly caused after the station wagon was itself struck by a luxury sedan driven by a 19-year-old P-plater.

Samanvidha Dhareshwar

Ms Dhareshwar was taken to hospital but she and her unborn baby, due in December, could not be saved

Aaron Papazoglu made a second bid for bail at Downing Centre Local Court on Friday after his first application was rejected on Sunday.

The university student, who has no previous criminal or driving offences, is accused of speeding up through

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