İstanbul Kent İçi Ulaşımda Sistem Tartışması: 1961–1974 Arasında Otobüs ve Troleybüs Modlarının Verimlilik Temelli Karşılaştırması
The System Debate in Istanbul City Transportation: A Comparison of The Efficiency of Bus and Trolleybus Models Between 1961 And 1974

Summary/Abstract: The shift in Istanbul's urban transport policies observed since the late 1940s has been reflected in the gradual phasing out of rail systems and their replacement with rubber-tyred transport systems. This study examines the bus and trolleybus systems operating concurrently in Istanbul between 1961 and 1974 within a comparative framework. This period represents a transitional phase in Istanbul's public transport history, marked by the institutionalisation of road based transport policies with the introduction of the trolleybus. By selecting this period, the study analyses both the search for post-tramway transport modernisation and the extent to which electrification-based alternative systems (trolleybuses) were sustainable from an economic, technical and institutional perspective. There are clear functional and structural differences between these two systems, both operated by public authorities. Comparing the bus and trolleybus systems in terms of key indicators such as efficiency, cost-effectiveness, and passenger satisfaction, based on archival documents, operational data, and periodical reports, allows for an assessment of the strengths and weaknesses of both systems. In this context, the study aims to provide an opportunity to re-evaluate past transport preferences in Istanbul, while also offering a historical perspective on today's urban transport policies.

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