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Introduces engineering concepts through twenty-five simple experiments that involve building several bridge and tunnel models.

Build realistic bridges and tunnel portals, from simple culverts and wood beam bridges to majestic stone arches and steel viaducts. Discover how different types

Provides an alphabetical reference to bridges and tunnels, including designers, builders, and materials and machinery used in their construction.

Delve behind the scenes to look inside bridges, tunnels and towers around the world. Lift the flaps to reveal the mechanics and engineering of constructions inc

Fog, tide, ice, and human error--before the American Revolution those who ventured to cross the vast Hudson Valley waterway did so on ferryboats powered by huma