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原文传递 AN ANALYSIS OF THE WORST COMMUTING DAYS IN WASHINGTON, DC (JUNE 1, 2000 TO MAY 31, 2001).

题名：	AN ANALYSIS OF THE WORST COMMUTING DAYS IN WASHINGTON, DC (JUNE 1, 2000 TO MAY 31, 2001).
作者：	Vasudevan-M; Wunderlich-KE
关键词：	Analysis-; Benefits-; Commuters-; Commuting-; Costs-; Heuristic-On-Line-Web-Linked-Arrival-Time-Estimator; Impacts-; On-time-performance; Reliability-; Route-choice; Schedules-; Traffic-congestion; Travel-time; Traveler-information-and-communication-systems; Washington-District-of-Columbia
摘要：	Previous research using the Heuristic On-Line Web Linked Arrival Time Estimator (HOWLATE) methodology showed that the user benefits associated with pre-trip route choice and trip timing are highly concentrated for congested PM peak trips. One implication of this finding is that pre-trip traveler information benefits increase with increasing congestion. This report explores how much benefit pre-trip traveler information provides on some of the worst commuting days, seen over a year, in Washington, DC. It analyzes the impacts on a commuter who does not utilize traveler information services, and examines what would have happened to his commute if he had made use of a notification-based pre-trip traveler information service on those days. The worst days were determined as those that had high travel times, travel disutility cost, travel-expenditure, late and early schedule delays, and poor on-time reliability and just-in-time reliability. When possible, contributing factors that made the days the worst with respect to a particular measure were identified from data on incidents, weather and high-demand. The study showed that the worst days varied by the measure of effectiveness chosen to rank them. High-demand was the main contributing factor for high travel time and travel expenditure, while incidents played a major role in increased travel disutility cost and late schedule delays, and poor on-time reliability and just-in-time reliability. The impacts on the worst days were significant for a commuter who did not rely on traveler information; typically late trips doubled and travel disutility cost jumped by 30%. The benefits of pre-trip traveler information were high on the worst days; lateness risk was cut by more than half and travel disutility cost was reduced by more than 20%. With respect to just-in-time reliability and early schedule delay, a commuter who made use of pre-trip traveler information fared better on the worst days than a commuter who did not use traveler information service on a typical day of the year. On the worst days, users who made use of pre-trip traveler information changed routes or trip start time or both on more than 60% of the trips.
总页数：	2002/11. pp22 (Figs., Tabs., Refs.)
报告类型：	科技报告