Resource congestion price
= Resource congestion price
{title2=$\mu_j$}
A resource congestion price signals scarcity at a capacity-constrained link. Under <multiplicative resource-price dynamics>, its increase indicates excess demand and its decrease indicates spare capacity. A route pays the sum of these prices, its <route congestion price>. A zero resource congestion price at an optimum satisfies <complementary slackness> with possible spare capacity.