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Environment
TOOLKIT HOME Planning and
Environment
NEPA and Project
Development
Streamlining/
Stewardship
Historic
Preservation
Section 4(f) Environmental
Competency Building
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Causes of Congestion

This pie chart, entitled "Causes of Congestion," shows six factors that contribute to congestion on the road. These include Bottlenecks (40%), Traffic Incidents (25%), Bad Weather (15%), Work Zones (10%), Poor Signal Timing (5%), and Special Events (5%).

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