The impact of scheduling on service reliability: Trip-time determination and holding points in long-headway services

This paper presents research on optimizing service reliability of longheadway services in urban public transport. Setting the driving time, and thus the departure time at stops, is an important decision when optimizing reliability in urban public transport. The choice of the percentile out of historical data determines the probability of being late or early, while the scheduled departure time determines the arrival pattern for travelers. A hypothetical line and a case study are used to determine the optimal percentile value for long-headway services without and with holding points. If no holding points are applied, it is shown that the 35-percentile value minimizes the additional travel time to 25 % of the reference situation. In the case of holding, two holding points combined with a 30–60-percentile value yield the best performance: a further reduction of the additional travel time with 60 %.Transport en PlanningCivil Engineering and Geoscience

Normalizing urban inequality: cinematic imaginaries of difference in postcolonial Amsterdam

Combining insights from critical urban studies with geographies of race and racism, this article examines the role of spatial imaginaries in normalizing urban inequalities, showing how such imaginaries make the associations between places and populations appear natural. We extend analyses of the interplay between material landscapes and imaginative geographies to examine how these connections feature in processes of gentrification and displacement and emphasize the necessity of an intersectional approach in understanding the cultural underpinnings of urban change. We propose that such analyses of dominant spatial imaginaries benefit from attention to their colonial roots, given the persistence of monomythical explorer-hero narratives and the mapping of reworked colonial imaginative geographies onto contemporary postcolonial cities. Our analysis focuses on Amsterdam, the popular Dutch film Alleen Maar Nette Mensen and the spatiality of difference that its ‘monomyth’ narrative presents. It justifies an unequal urban order by contrasting Amsterdam’s city centre, which is depicted as White, middle-class and ‘civilized’, with the post-war urban periphery, which is cast as a mysterious place of racialized poverty, squalor and pathological behaviour. This culturally essentialist depiction contributes to the depoliticization of state-led gentrification and normalizes changes to the material cityscape