An ambulance or a customer's vehicle may be boarded on a preferential basis if it needs to be transported due to an “emergency situation,” in accordance with the provisions of the Authority's Emergency Transportation Policy. In such an emergency situation, other vehicles with reservations may be “bumped” from their reserved trips in order to accommodate the ambulance or customer needing to travel on an emergency basis. On occasion, the Authority also may board vehicles in a different order for other reasons when warranted and at the discretion of the Terminal Agent. For example, the next vehicle to be boarded may not easily fit within the next available space, or a different order of boarding may improve the efficiency of the Authority's operations or ensure compliance with United States Coast Guard requirements. The Authority also may board vehicles in a different order when unusual circumstances (such as a road closure or excessive tide conditions) occur in an effort to minimize the amount of disruption and inconvenience to its customers on an equitable basis.