Why Railroads Don't Need Expansion Joints

From a channel Lumen includes in full: Grady Hillhouse, a licensed civil engineer, explains dams, roads, bridges, drainage and infrastructure failures with tabletop demonstrations and sourced case studies; among the most trusted civil-engineering explainers online.

A 16-minute video from Practical Engineering's catalogue; the title names its topic.

Video by Practical Engineering, played through YouTube's embedded player.