FULL PACKET_2010-04-05 - Laserfiche WebLink

Home Browse Search

QUEUING ANALYSIS Corinthian College proposes to take over the entire 500 West Santa Ana Boulevard building and the parking structure for their operation. The method of operation of the parking structure intake gate for the Corinthian College has not yet been established. Careful consideration of the operation of the structure is needed, since under peak arrival conditions (prior to class start times), vehicles could queue in the inbound lane, and potentially back up onto 3'd Street. The entrance to the parking structure provides approximately 65 feet inbound queuing distance between 3'd Street and the parking structure gate. Assuming a vehicle queuing distance of 20 to 25 feet per vehicle, the driveway will accommodate a queue of 2 to 3 vehicles on the inbound lane. The length of the inbound queue at the structure gate will be a product of a number of factors, including the number of lanes available for arriving vehicles, the arrival rate of the inbound vehicles (number of student and staff arrivals at peak times) and the amount of time it takes to process each incoming vehicle. For example, the service time for each entering vehicle would be less than 5 seconds per vehicle for a ticket/lift -arm and pay -0n - departure or for an electronic card entry operation, but could be 30 seconds or more for pay- upon -entry or manual identification verification operation. A queuing analysis was conducted to evaluate entry conditions. For a worst -case analysis, it was assumed that all arriving students in the maximum class session (estimated to be 249 students) would arrive during the half hour before the start of the class. Based on this analysis, to avoid an inbound queue at the structure entrance that backs onto the public street, it is recommended that the entry procedures and equipment for the parking structure be designed so that the duration of the entry transaction is less than 5 seconds during peak arrival periods. This could be accomplished in a number of ways, including with an electronic pass card system, a parking permit displayed on the vehicle, or a ticket entry / pay on departure system. A longer entrance transaction would potentially result in queues in the peak arrival times that would extend beyond the entrance throat into the street. The queuing analysis worksheet for the project driveway is located in Attachment B. As indicated above, queuing conditions at the entrance could be alleviated by providing 10- to 15- minute breaks between class shifts, and /or staggering class start times. Implementing measures to encourage alternative travel modes and reduce single- occupant vehicles would also alleviate queuing and parking demand. Corinthian College -17- February, 2010 Parking Study 31A-37