Su Yuejiang1,Wei Qingbo2,Wu Dexin1, Cui Ang1
(1.Center Guangzhou Transport Research Institute, Guangzhou Guangdong 510627, China; 2.Guangzhou Public Transport Data Management, Guangzhou Guangdong 510635, China)

Abstract： In recent years, using road traffic performance index turns to be ever-increasing popular in Chinese cities, in which it is adopted to assist in decision-making in traffic management and public travel services. This paper first summarizes the essence of traffic congestion and traffic performance index, as well as the difference of various types of traffic performance index. The paper then discusses a number of critical limitations about the existing traffic performance index, including raw data collection and indicator selection process. Finally, the paper provides corresponding improvements: 1) enhance traffic assessment model; 2) develop forecasting model and publication mechanism; 3) strength data collection technology; and 4) propose a synthesized traffic performance index.

Keywords： traffic management; traffic performance index; percentage of congestion mileage; travel time ratio