Abstract: The high cost of conventional highway noise abatement methodology (i.e., free‐standing walls) has made mitigation of many impacted sites economically infeasible. A solution that may prove more economically reasonable for ...

Abstract: In September 1999, the writers began a study for the Arizona Department of Transportation to develop Arizona-specific Reference Energy Mean Emission Levels. This study was conducted to determine if the noise emission ...

Abstract: Among the most difficult challenges faced by transportation agencies in the last 25 years relates to informing the public so that opposition to proposed projects is kept to a minimum. This paper examines the methods used ...

Abstract: Environmental analysis of transportation systems is a comprehensive and demanding task. The environmental planner is required to carefully and objectively examine project data provided by transportation planners and ...

Abstract: Many local agencies responsible for the sewage treatment process manage a large number of small treatment facilities that serve low-density residential areas. This process is often noisy and, as a result, frequently generates ...

Abstract: Of all the stages of expert systems construction, none is more critical than knowledge acquisition. This is particularly true in instances where domain experts such as civil engineers develop expert systems themselves, ...

Abstract: Widespread availability of microcomputers has made highway noise analysis tools easily accessible to an ever-increasing number of users. This increased availability has brought to light a significant problem relative to ...

Abstract: One of the large analyses in this country of the need for sound absorptive treatment on highway noise barriers was conducted on the Interstate 440 project in Nashville, Tennessee. Special considerations had to be made of ...