Why do people select one transportation mode over another for their business and pleasure/personal trips? Many theories have been put forward on mode selection decision processes. Most theorists, however, consistently identify availability, frequency, cost/price speed/time, and comfort/luxury as the mode decision available. Other factors that have been suggested are safety, convenience, ground services, terminal facilities and locations, status and prestige, and departure and arrival- times. People in different segments of the travel market place varying degrees of value or utility on these criteria. For example, a business departure/arrival times may be all-important to the business traveler, while cost/price may be the pleasure traveler's first criterion.