In spite of the real time data collection techniques mentioned above that might be available for the ambulance drivers , reaching the incident locations within a shortest time puts the ambulance drivers under time pressure which often causes psychological stress on these drivers (Jains , 1993 . This stressful condition can affect the drivers ' judgments on which routes to follow , especially if there are many factors that can affect this decision (Trakofler and Vaught , 2003 . Due to all such reasons as mentioned above...











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