The High Court at Auckland has been told that an Auckland man killed his four-year-old son by deliberately driving into the path of an oncoming train.
The collision occurred in January last year when Alan James Stephens, 39, drove around barrier arms and onto train tracks at a Pukekohe railway crossing.
Trae Blayde Mitchell-Stephens died and three other children were injured.
A prosecutor told the High Court he will provide evidence of appalling driving leading up to the collision.
He says the accused ignored flashing lights, warning-bells and barrier arms as he drove onto the train tracks.
The accused denies one charge of manslaughter and three charges of dangerous driving causing injury.