Why there are abandoned tunnels under Dallas

We love a tunnel on this show. A few months ago Kara told Matt all about the FBI's secret tunnel under the Russian embassy in Washington. Today Matt takes Kara back underground, digging into the rise and fall of the pedway: an infrastructure idea that spread through North America in the 1960s and 70s, from Montreal to Dallas to Calgary, with mixed results. Follow If You're Listening on the ABC Listen app. Check out our series on YouTube: https://www.youtube.com/playlist?list=PLDTPrMoGHssAfgMMS3L5LpLNFMNp1U_Nq