Development of road functional classification in China: An overview and critical remarks

Abstract

Road functional classification is of significance for achieving high transportation efficiency. The road network planning and design mainly depend on road functions. This concept is used in almost all countries throughout the world. This paper presents a review on the development of road functional classification systems in codes and standards in China over the past decades, whose importance received limited attention to date. Functional classification systems include the urban road functional classification system and the highway functional classification system. The review includes major components of the road functional classification, consisting of context analysis, modal accommodations and detailed categories. In addition to these concerns, some ideas for future development, especially for context definitions, functional classification concepts and criteria, and quantitative functional evaluation, are discussed.