Assessing The Spatially Heterogeneous Impact of Recurrent Flooding On Accessibility: A Case Study of The Hampton Roads Region:Part 2 Transit Accessibility
arxiv(2024)
摘要
Due to accelerated sea level rise and climate change, the transportation
system is increasingly affected by recurrent flooding coastal regions, yet the
cumulative travel disruption effects are not well understood. In Part 1 of this
study, the accessibility impacts of recurrent flooding on the auto mode were
examined. In this paper (Part 2 of the study), the impact of recurrent flooding
on transit service accessibility was quantified with the aid of spatially and
temporally disaggregated crowdsourced flood incident data from WAZE. A fixed
route transit network is built for five time of day periods for 710 traffic
analysis zones (TAZs), to capture the spatial and temporal variation of transit
accessibility reduction due to recurrent flooding. Results show that the
greatest transit accessibility reduction occurs during the morning peak hour,
with individual TAZ transit accessibility reduction ranging from 0 to 88.2
work trips (with an average of 6.4
trips (with an average of 3.7
indicates that TAZs with a greater share of people with higher vulnerability in
transportation and socioeconomic status are more likely to experience recurrent
flooding-induced transit accessibility reduction. Results from this study
reinforce the notion that transportation impacts under recurrent flooding are
not uniformly experienced throughout a region, and this spatial and temporal
variation translates to different impacts borne by various population groups.
Disaggregate impact analysis like this study can support transportation
engineers and planners to prioritize resources to ensure equitable transit
accessibility under increasing climate disruptions.
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