- wiki2.org en/History_of_transport
- american-rails.com history.html
- intrans.iastate.edu news/trains-a-history/
- transportgeography.org Contents …/transportation-and…
- discoverwalks.com blog/world/20-historical-events…
- corsia.us transportation-in-the-united-states-a-…
- gogocharters.com blog/history-of-public-bus-…
- brilliantio.com how-has-travel-changed-over-the-…
- chipnation.org brief history of transport&FORM=…