Change in London travel time: This is a continuation of . The rate of change in travel time with respect to traffic flow is the additional travel time that will be required if one additional vehicle...

Change in London travel time: This is a continuation of . The rate of change in travel time with respect to traffic flow is the additional travel time that will be required if one additional vehicle is added to the flow. The formula for this change can be calculated as

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a. If the traffic flow is 1000 vehicles per hour, how does the addition of one vehicle affect travel time?

b. If the traffic flow is 3400 vehicles per hour, how does the addition of one vehicle affect travel time?

c. Using your answers to parts a and b, discuss how travel times in central London are affected by increasing traffic flow.