The East Los Angeles Interchange Is the Busiest Freeway Interchange

Essay

The East Los Angeles Interchange is the busiest freeway interchange in the world.In 2008,an average of 550,000 cars passed through the intersection per day with a standard deviation of 100,000.What is the probability more than 620,000 use the interchange on a random day? Assume the number of cars on the interchange is approximately normally distributed.