Induced demand is not a phenomena to be feared but one to be welcomed, according to a recent Reason Foundation report by Steven Polzin. Demand for travel is always growing, and if new roads reduce the cost of travel, they will be used. Highway opponents say that’s why we shouldn’t build new roads, but Polzin points out there are many economic benefits from new road capacity and even from the demand “induced” by that new capacity.
Click image to download a 1.2-MB PDF of this 35-page report.
New road capacity, Polzin says, allows people who either weren’t traveling at all due to congestion or who were traveling at inconvenient times or routes to avoid congestion to travel at preferred times and routes. This makes it appear that new capacity has “induced” demand but all it has really done is released demand suppressed by congestion. To the extent that new capacity leads to new travel, says Polzin, that generates economic activity that is good for the region. Continue reading
