n urbanism, “induced demand” refers to the idea that increasing roadway capacity encourages more people to drive, thus failing to improve congestion.
Since the concept was introduced in the 1960s, numerous academic studies have demonstrated the existence of ID.
But some economists argue that the effects of ID are overstated, or outweighed by the benefits of greater automobility.
Few federal, state, and local departments of transportation are thought to adequately account for ID in their long-term planning.