515 While passing through a level crossing, (A)parking is not allowed (B)U-turn is not allowed (C)all of the above.

512 When approaching a level crossing with a gate or a guard, and if the guard does not signal to stop when the train is coming, (A)the driver should still look and listen first for any incoming train and pass through when is is safe (B)follow another vehicle closely and speed through the crossing (C)speed through whenever is possible.