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The users manual presents a detailed description of the TSC highway noise prediction computer program. The evolution of the TSC program is described to illustrate salient differences between successive versions of the computer code. The version presented in this manual is called the MOD-04 version. The manual relates the analytical basis to the coded statements to indicate how the prediction procedure utlizes input data. The manual describes the features of the MOD-04 version and present guidelines for formulating problems. Detailed description of input data requirements and example problems are presented to illustrate usage of the computer program. The appendicies to the users manual describe the theoretical basis, computer system details, and subprogram descriptions of the MOD-04 version of the TSC highway noise prediction code.
Various methods of assessing noise, loudness, and noise annoyance are reviewed and explained; sources, types, and intensities of traffic noise are noted; typical means of abatement and attenuation are described; design criteria for various land uses ranging from low-density to industrial are suggested and compared with the results of previous BBN and British systems for predicting annoyance and complaint; and a design guide for predicting traffic noise, capable of being programmed for batch and on-line computer applications, is presented in form suitable for use as a working tool. A flow diagram describes the interrelationships of elements in the traffic noise prediction methodology, and each element is discussed in detail in the text. The text is presented of a tape recording that takes the listener through a series of traffic situations, with such variables as traffic distance, flow velocity, distance, outdoors and indoors, and presence or absence of absorbers and attenuators.
A description of motor vehicle noise sources and the potential for their control is provided. The report presents an overview of the suggested noise prediction methodology, which is a four step process that includes approximating noise impacts using a nomograph procedure to determine noise levels associated with given traffic and site characteristics; refining these predictions by more accurate representation of design parameters and use of a computer program that is able to plot as well as calculate noise impact; introducing appropriate noise-control options and evaluate them, using a noise barrier nomograph solution; lastly, selected options are fully evaluated using the computer program.