Where there are two sets of railway tracks, there are no second chances
There's nothing more exciting than a high-speed, action-packed hockey game, where the goalie is tasked with stopping rapid fire shots on goal. When one shot is stopped, it's never safe to sit back because another one is sure to follow. This holds true for railway crossings with two sets of tracks.
Watch this video featuring Kim St. Pierre, goalie for Team Canada, for a reminder that where there are two sets of tracks, there is double the danger. Pay close attention and look both ways - you may have to wait for not one, but two trains to pass.