Browsing by Subject "Bus"

Now showing 1 - 2 of 2
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    Accessibility Impacts of Bus Access to Managed Lanes
    (2017-09) Carlson, Kristin
    This research introduces a method to measure changes in transit accessibility resulting from adjustments in bus-highway interactions. Operational differences between general purpose (GP) and managed lanes (ML) are measured using average travel time. Changes to transit travel time are systematically introduced to General Transit Feed Specification (GTFS) data through the use of the StopTimesEditor computer program developed for the purpose of this analysis. The methodology is tested on two express bus routes in the Minneapolis - St. Paul region (Twin Cities). The change in operating speed along portions of the selected transit routes is translated to changes in the job accessibility of the surrounding communities. The percent change in the worker-weighted average job accessibility for the area surrounding the transit routes and for the entire metropolitan region are 11.0\% and 0.26\% respectively. The methods introduced in this study can be used to evaluate the accessibility impacts of different highway operating environments for buses, or estimate the accessibility outcomes of different bus-highways scenarios.
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    The Components of Transit Time and Their Effects on Trip Mode Choice
    (2017-05) Chien, Ryan
    Travelers consider a tradeoff between the components of transit time when choosing between driving and taking the bus. These components are In-Vehicle Transit Time for driving, and Out-of-Vehicle Walk Time, Out-of-Vehicle Wait Time, and In-Vehicle Transit Time for taking the bus. Transit data often uses revealed preferences surveys, therefore the components of the nonselected alternative must be ignored or estimated. The result is either a reduced understanding of the components in the former case, or due to computing constraints, the imposition of limiting assumptions in the latter. To better understand the relative values of the components, this paper presents a novel estimation method, tests previously applied assumptions, and estimates their true values. Results indicate that travelers value each component differently, and previous assumptions are not justified. Furthermore, results indicate that the value of IVTTbus varies across market definitions.