This document contains information useful for the development of noise emission standards for motorcycles. Topics covered include information on motorcycle construction, noise characteristics of models currently on the market, and noise reduction techniques and costs necessary to achieve specified noise levels.

"TRB's Airport Cooperative Research Program (ACRP) Report 105: Guidelines for Ensuring Longevity of Airport Sound Insulation Programs provides best practices in all phases of a sound insulation program to reduce or eliminate future deterioration issues. ACRP Report 105 complements ACRP Report 89: Guidelines for Airport Sound Insulation Programs. The contractor's final report, which assesses sound insulation treatments as part of the first phase of the project that developed ACRP Report 105, is available for download."--Publisher's description.