A chain is no stronger than its weakest link. This fundamental concept can also be applied to roads in the sense that a road is only as effective at moving traffic as its widest (and most efficient) point. There are many examples in Ottawa and around the world of important roads that, while considerably wide along much of their length, fatally narrow at certain points. These narrow points mean less traffic can flow through, impacting the effectiveness and capacity along the entire length for the road.