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93 nent available test section data (e.g., age/traffic data, cli- study to allow for an evaluation of the long-term friction, mate data, and pavement data), indicated that near-field SI noise, and durability characteristics of different texture noise is influenced to a large extent by texture depth and by forms. texture type and direction. Also, SI is increased as the num- Conduct a study of the effects of aggregate used in the ber of traffic applications is increased and the number/ concrete surface layer on texture durability. frequency of joints is increased. Continue to evaluate and model texturenoise relationships for various surface textures, with special consideration of PSD texture parameters. Recommendations Conduct investigations to enhance the methods for field- for Future Research measuring friction and noise characteristics of pavement The following are recommendations for future research: surfaces. Conduct investigations of EAC and other textures to Perform additional field testing on the existing test sections develop a better understanding of the friction, noise, and and the newly constructed test sections included in this durability characteristics of these and others.