Building the National Road • Trees, stumps, brush, and rock were removed.
• Hills were leveled, and hollows were filled
• Layers of stone were laid in graduated sizes.
• Drainage ditches were dug
Federal regulations were adopted to ensure safety and
ease of travel on the road.
State governments cooperated closely to maintain road
quality
Which of the following was the most direct result of the environmental
modifications listed above?
Improved transportation to western states expanded
trade and settlement.
Road construction became a major industry in the United
States,