https://transportationhistory.org/2026/08/21/the-third-regional-meeting-centered-around-plans-for-a-u-s-numbered-highway-system-transpires-in-chicago/Transportation Historyen2026-08-21T18:04:33+00:00The Third Regional Meeting Centered Around Plans for a U.S. Numbered Highway System Transpires in ChicagoAASHO, Chicago, highways, state departments of transportation, U.S. Bureau of Public Roads, Illinois, U.S. Numbered Highway Systemhttps://transportationhistory.org/wp-content/uploads/2026/08/kimball-building.jpg?w=118