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.

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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 today after his first application was rejected on Sunday.

The university student, who has no previous criminal or driving offences,

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