Intelligent Transportation Systems in Headway-Based Bus Service (2021) / Chapter Skim
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1 High-frequency bus routes, defined as those with a headway of 10 minutes or less, often experience various operational problems, such as schedule adherence, bunching and gapping, and full load capacity. These problems are particularly severe in high- frequency service because passenger arrival patterns and interactions between buses create a positive feedback loop where small variations in bus travel time quickly develop into larger problems if left unchecked.
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2 Intelligent Transportation Systems in Headway-Based Bus Service • Short turns, when buses turn around before the end of the route and enter service in the opposite direction. • Speed guidance, where bus drivers are instructed to adjust their driving to make up time or slow down.
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Summary 3 • Costs: The costs of implementing HBS are difficult to quantify because many ITS technologies are already widely implemented (e.g., CAD/AVL) and shared across the agency.
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