 They are the Buck O'Neil Bridge on US 169, Heart of America Bridge on Route 9, the Bond Bridge on I-29/35/US 71, and the Chouteau Bridge on Route 269.A fifth bridge to the west of the Heart of America Bridge, the ASB Bridge, originally carried road and rail traffic, but is now only a rail bridge.A dedicated bicycle/pedestrian path on the Heart of America Bridge opened in October 2010.