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原文传递 SIMPLIFIED AND RATIONAL APPROACH TO ADDRESS NEW MODELING REQUIREMENTS FOR CONFORMITY ANALYSIS.

题名：	SIMPLIFIED AND RATIONAL APPROACH TO ADDRESS NEW MODELING REQUIREMENTS FOR CONFORMITY ANALYSIS.
作者：	DeCorla-Souza-P; Everett-J; Gardner-B; Culp-M
关键词：	AIR-QUALITY; COMPLIANCE-; TRAVEL-; FORECASTING-; SPEED-; TRAVEL-TIME; EMISSIONS-; CASE-STUDIES
摘要：	Recent conformity regulations require air quality nonattainment areas in serious or higher categories to use many model features that are not currently used in the travel forecasting processes of most urban areas. Many of these requirements are related to speed and travel time estimates. For example, travel times used in trip distribution are required to be in reasonable agreement with travel times resulting from trip assignment. In addition, peak and off-peak travel demand and speed estimates are required. The issues relating to each of these requirements are discussed; procedures to satisfy these requirements in a simple but rational way are developed; the potential impacts of the simplified procedures on emissions estimates and conformity tests are investigated. Another issue relating to speeds and travel time is whether trip speeds instead of link speeds should be used as inputs to emissions analysis. In current practice, a link-based approach is used to obtain speed and vehicle activity inputs for EPA's MOBILE5 emission factor model. Nevertheless, a trip-based approach is more rational because it is consistent with the way speed cycles are used to develop emission factors. The impact a trip-based approach might have on the results of conformity analysis is examined through a case study application of a conformity analysis for a typical large urban area.
总页数：	Transportation Research Record. 1995. (1472) pp9-16 (4 Fig., 2 Tab., 13 Ref.)
报告类型：	科技报告