Improved classification of Canadian primary highways according to type of road use

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Abstract
An improved method of road classification is suggested for use by provincial or state highway agencies. The proposed classification is based on temporal volume variations and road use characteristics, such as trip purpose, and trip length distribution. The primary highway system of the province of Alberta, Canada, is investigated for the purpose of this study.The proposed method is more objective, comprehensive, and statistically credible than the existing methods. It involves the application of such standard computational and statistical techniques as (i) hierarchical grouping, and (ii) Scheffe's S-method of multiple group comparisons. The analysis presented in this paper is expected to provide highway agencies with a better understanding of individual routes in their road network systems. The proposed method has implications for a standard classification of roads on a provincial and national basis. Such a classification can hopefully lead to an overall consistency in planning and design of roads for both economic and safety purposes. Keywords: roads; road classification; road use; temporal volume variations; traffic counters; traffic volume; trip purpose; transportation.

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