Diane Richards has three major routes to take to work. She can take Tennessee Street the entire way, she can take several back streets to work, or she can use the expressway. The traffic patterns are very complex, however. Under good conditions, Tennessee Street is the fastest route. When Tennessee is congested, one of the other routes is usually preferable. Over the past two months, Diane has tried each route several times under different traffic conditions. This information is summarized in minutes of travel time to work in the table:
UPLOADED.
In the past 60 days, Diane encountered severe traffic congestion 10 days and mild traffic congestion 20 days. Assume that the last 60 days are typical of traffic conditions.
(a) Develop a decision table for this decision.
(b) What route should Diane take if she wants to minimize average drive time?
(c) Diane is about to buy a radio for her car that would tell her the exact traffic conditions before she started to work each morning. How much time in minutes on the average would Diane save by buying the radio?
Sample Solution