ABSTRACT
Following Chapter 18, transit-service reliability is receiving increased attention as agencies are faced with immediate problems of proving credible service while attempting to reduce operating cost. Unreliable service has also been cited as the major deterrent to existing and
potential passengers. Due to the fact that most of the transit attributes are stochastic, travel time, dwell time, demand, etc., the passenger is likely to experience unplanned waiting times and ride times. One of the main components of service reliability is the use of transfersas is clearly indicated in Chapters 13 and 14. Transfers have the advantages of reducing operational costs and introducing more ¦exible and efcient route planning. However, its main drawback is the inconvenience of traveling multilegged trips. Some works introduce synchronized (timed) timetables to diminish the waiting time caused by transfers. Their use, however, suffers from uncertainty about the simultaneous arrival of two (or more) vehicles at an existing stop. In order to alleviate the uncertainty of simultaneous arrivals, operational tactics such as hold, skip-stop, and short turn can be deployed considering the positive and negative effects, of each tactic, on the total travel time (TTT).
