• Wetlands and Highways: A Natural Approach

This brochure discusses alternative approaches to minimizing wetland loss as well as wetland mitigation projects and mitigation banking to protect wetlands, and highlights 10 wetland mitigation
projects that have received acclaim for their innovation and success. The brochure also discusses tips for potential mitigation bankers and provides information on existing and planned wetland mitigation banks throughout the United States.

•Evaluation and Management of Highway Runoff Water Quality (Water Quality Synthesis)

This manual consolidates the results of past research on highway runoff and water resources. The single volume manual is useful to highway designers and environmental professionals by presenting the available and appropriate impact prediction and mitigation tools for use during highway project planning and development activities. This manual is a self-contained desk reference for highway practitioners and includes an extensive bibliography.

• Ultra-Urban Best Management Practice Assessment and Analysis of Highway Stormwater Runoff (original title); Stormwater Best Management Practices in an Ultra-Urban Setting: Selection and Monitoring.

A compilation of available literature on ultra-urban best management practices (BMPs) resulted in this searchable database on runoff pollution reduction methods suited to limited space application. Included with the database are BMP selection criteria and decision support system, as well as appropriate monitoring design and implementation recommendations.

• FHWA Highway Traffic Noise Prediction Model

The new FHWA Traffic Noise Model (TNM) was released on March 30, 1998. This marked the end of more than 6 years of research to develop a new model to incorporate over 2 decades of improvements in the state of the art of predicting highway traffic noise, as well as continuing advancements in computer technology. The TNM bases its calculations on totally new acoustical prediction algorithms, as well as newly measured vehicle emission levels for automobiles, medium trucks, heavy-duty trucks, buses, and motorcycles. Early validation of the TNM has shown an improvement in prediction accuracy.

This technical assistance tool is directly useful to State and local planners and analysts who are continually struggling to address the noise impacts of transportation projects, particularly in rapidly growing urban and suburban areas served by major highways. The TNM aids in providing a better understanding of noise issues associated with the design of new or reconstructed transportation facilities. This understanding helps the FHWA encourage State and local governments to regulate land development in such a way that noise-sensitive land uses are either prohibited from being located adjacent to a highway, or that the developments are planned, designed, and constructed in such a way that noise impacts are minimized.