Some cards allow you to play them on other players, hindering their progress, while others help you out, mostly by avoiding bad cards that others might play on you. So everyone races around the board, delivering rapidly aging pizzas, trying to get 10 on-time pizzas delivered before anyone else. While there are some lines drawn on it as roads, they have no bearing on play. You are told they are just for decoration. This is very disappointing - you may as well be playing on a checkerboard.
Movement is from square to square, with no attention to the roads.
This wouldn't be so bad, but frankly the lines drawn on the map aren't very decorative - they're downright ugly. The game becomes a very one-sided stomp. Fortunately, this can be fixed. The tip cards, which you have to cut out yourself, can be duplicated on many desktop computer systems so as to be nearly indistinguishable from the cards in the deck. The game would then be a much better game.