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Activity Four: ...But How Do We Build Them?

Part 1: Then Verses Now.

Provide students with a list of different road building materials, including their pictures an a brief description of what they are, and have them figure out whether they were use in pioneer trails, modern highways, or both.

Pioneer Trails Both Modern Highways

List of possible road materials includes:

sand

concrete

dirt

iron

rock/stones

fiber optics

wood

asphalt

steel

water

Then, as a class, discuss the students' ideas.

Then use resources, internet links provided,

as well as other sources to discover what materials

were used in pioneer trails, roads and bridges and

what is now used in modern highways

to see how close the students were.

Links:

http://www.environment.transportation.org/

http://www.cement.org/pavements/pv_cp_highways.asp

http://www.fhwa.dot.gov/legsregs/directives/

policy/recmatpolicy.htm

http://encarta.msn.com/text_761566545_1/fiber_optics.html

http://www.highways.gov.uk/aboutus/1137.aspx

http://www.moasphalt.org/facts/asphalt/menu.htm

http://en.wikipedia.org/wiki/History_of_road_transport

(see wheeled transport, roman roads, new construction methods

in the 18th and 19th centuries, and development of paved roads sections)

Part Two: Global Comparisons.

Autobahn

U.S. Highways

South American Highways

African Highways