Automated Ground Transportation System Stations with Multiple Loading Positions

This paper presents analytical results for multiple loading positions that are arranged in series, parallel, or some series-parallel combination. Vehicles approach the station at a constant velocity before decelerating at a constant level to reach their designated loading positions. After remaining in the station for a specified period of time they accelerate at a constant level until resuming their initial velocity. Expressions for maximum station throughput are derived upon taking emergency stopping distance and the braking system response time as alternative bases for the minimum spacing between successive vehicles. It is noted for several illustrations that much of the high station throughput associated with response time intervehicle spacings may be alternatively achieved by adhering to the simpler control strategy involving stopping distance spacings and by employing an emergency braking rate which is approximately twice the level for operational deceleration.