Traffic congestion seems to worsen each year. This raises the
question, How much does roadway congestion cost the United States
annually? The Federal Highway Administration's Highway Performance
Monitoring System conducts an analysis to produce an estimate of
the total cost. Drivers in the 73 most congested areas in the
United States were sampled, and each driver's congestion cost in
time and gasoline was recorded. The total number of drivers in
these 73 areas was 128,000,000.
a. Estimate with 95% confidence...