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An Integrated System of Freeway Toll and Traffic Data Investigation: PDF417 Two-Dimensional Bar Code System

Aiming at the deficiency of being difficult to investigating and analyzing the traffic data by the toll data of freeway, utilizing the information storage technology of PDF417 two-dimensional (PDF417-2D) bar code, this paper sets up an integrated system of freeway toll and traffic data investigation, makes the encoding rules and content of record information which on the PDF417-2D bar code, and presents the procedure of toll and traffic data investigating. Combining Microsoft SQL Server data base management system and utilizing the data information of PDF417-2D bar code, this paper also proposed methods of freeway traffic volume OD investigation, creating OD matrix of entrances and exits, and calculating average traffic volume of section, which has offered a new approach to the unity of freeway toll and traffic data investigating and analyzing.