Right. For example, say you have a street network with a main street at capacity (IE, stabilized at crowded, but endurably so), and four outlying streets that e

Right. For example, say you have a street network with a main street at capacity (IE, stabilized at crowded, but endurably so), and four outlying streets that eventually lead to the same destination, but have a less appealing route (slower, toll stops, plagued with potholes, pick one). The outlying routes may not be crowded at all, but if the main road is widened, it will probably absorb even more traffic from the outlying streets. You could make this into a graph problem, if you like, or draw analogies to finding parking.