Research contributions to managing transit service reliability

Abstract

Service reliability problems are a major concern shared by transit system users and operators. Unreliable service leads to additional vehicle requirements and higher operating costs; passengers suffer increased wait time and higher travel time uncertainty, leading to a general dissatisfaction with service and the possibility of seeking other means of transport. Because of the significance of this problem, considerable research attention has been focused in recent years on developing ways to improve service reliability. This paper examines contributions which have been made to managing transit service reliability. This topic encompasses the subjects of vehicle run time, run time variation, headway variation, passenger wait time, and reliability control. Both theoretical and empirical approaches have been undertaken, and each has contributed to our knowledge in addressing the overall problem. Significant contributions to the state‐of‐the‐art are reported and the implications on present practice are discussed.

Crowding in public transport systems: Effects on users, operation and implications for the estimation of demand

“…A second effect of high occupancy levels on waiting times is the possibility of triggering bus bunching (Abkowitz and Tozzi, 1987). When a bus is full and does not stop to pick up passengers at a bus stop (or if it stops but it is unable to load all passengers waiting), a larger number of passengers than is expected are left to wait for the next bus, which will need to stop for a longer period of time to board the increased number of passengers, presuming it too has capacity to accept the additional passenger load.…”

Automated Bus Dispatching, Operations Control, and Service Reliability: Baseline Analysis

“…With short headways and riders arriving randomly in relation to scheduled service, reliability may be better reflected in the ability to maintain headways rather than adhere to the schedule (Abkowitz and Tozzi, 1987;Hundenski, 1998). The third service reliability measure examines bus run times.…”

“…The third service reliability measure examines bus run times. Variations in run times reflect the composite effects of disruptions to service associated with traffic, signal timing, on-street parking, passenger activity, and driver behavior (Sterman and Schofer, 1976;Abkowitz and Tozzi, 1987).…”

“…There is a fairly rich literature on running time models, with excellent reviews and discussion provided by Abkowitz and Tozzi (1987), and Sterman and Schofer (1976). As Sched.…”

Kent İçi Ulaşımda Yolculuk Amacına Bağlı Güvenilirlik Algısının İncelenmesi: Tınaztepe Kampüsü Öğrenci Erişimi Örneği

“…Abkowitz vd. [8] Davranış modellerini doğrulamada en çok kullanılan ampirik yöntemler, "belirtilen tercih" [10] veya "ortaya konan tercih" [11] anketleri gibi doğrudan yöntemler veya döngüsel dedektör verileriyle yolculuk süresi değişkenliğini kalibre eden dolaylı yöntemler [12] olabilmektedir [1]. Bu çalışmada ulaşım kararlarının analizinde sıkça kullanılan, "belirtilen tercih" anket yaklaşımından yararlanılmıştır.…”