bridge construction set was an erlier version, then came pontiflex i believe and now you have Bridge it which is basiclly the same thing but with nice graphics. This game if you can call it that is great, it requires some brains to complete the task as you have limited money on steel , iron, cables etc so you have to figure out a way how to build a bridge that will support a train or some cars...
i spent a whole week playing bridge construction set around 9h a day...
it really killed time for me