According to a recent study, U.S. drivers spend approximately 38 hours each year just sitting in traffic. Los Angeles drivers experience the worst traffic congestion; for example, on Interstate 405,...

According to a recent study, U.S. drivers spend approximately 38 hours each year just sitting in traffic. Los Angeles drivers experience the worst traffic congestion; for example, on Interstate 405, drivers traveled just 14 miles per hour.4 Random drivers in some of the most congested cities were asked for the time (in minutes) it normally takes them to get through the traffic congestion during morning rush hour. The cities and summary statistics are given in the following table.