Traffic Monitoring Guide
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    The following discussion provides a synopsis of the material covered in the following sections. In Section 2 of this Guide, the reader will find a discussion of the structure of traffic characteristics monitoring; how traffic counting, vehicle classification, and truck weighing relate to the overall monitoring effort; and how this effort is structured through the sample design. In Section 3, traffic counting is discussed. This chapter focuses on the development of the statistical scheme. The sample is critical to both the reliability of information on traffic volumes and to the later development of samples for vehicle classification and vehicle weighing. Section 4 covers vehicle classification. This section includes aspects of sample development pertinent to obtaining vehicle classification information along with a description of the FHWA vehicle categories. Section 5 covers truck weighing and contains information on collection and summarizing data obtained at truck weigh sites. Also included are discussions of the various types of equipment available for weighing vehicles and the specification of the traffic characteristics sample design for obtaining truck weight information. This Guide is intended to be a statement of good practice. It is not to be considered a Federal standard. Data collection agencies are encouraged to consider the methods presented here in their administration of a data collection program and to compare the cost-effectiveness of this methodology to procedures they presently use.
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