The interaction of context and demography in equity effects of congestion pricing.

University essay from KTH/Trafik och logistik


The equity effect of congestion pricing has been advocated to be given enough

concern for its acceptability. This thesis aimed to explore the mixed effects in

travel behaviour changing caused by congestion charging in demography factors

(social economic status) and context factors (location, flexibility, access to car

and possession of long-term public transport card). In order to understand by

what mechanisms congestion pricing affects the equity, structural equation

modelling was applied to model the causal networks in the case study of

Stockholm congestion charge. Results revealed a more complicated influence

from different combination of factors. The location relative to charging cordon

mattered for the trip-making both directly and indirectly through the transport

mode preference. The work schedule flexibility should be also taken into

consideration when considering the time-based scheme. The mixed effects

between two groups of factors suggested that more factors should be considered

when justifying the privileged group and disadvantaged group to implement the

policy. The method used in this thesis could be very constructive for equity effect

evaluation in other cities with different conditions.

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