摘要: Each year TRB sponsors a series of synthesis reports on current knowledge and practice in the airport industry. The intention of the synthesis is to develop a compendium of best available knowledge on addressing or resolving speci... 展开 Each year TRB sponsors a series of synthesis reports on current knowledge and practice in the airport industry. The intention of the synthesis is to develop a compendium of best available knowledge on addressing or resolving specific airport problems. Often, if the topic warrants further investigation, a full-scale research effort follows a synthesis project. This synthesis was initiated because a downturn in the demand for air service, general aviation, and cargo at U.S. airports in 2008 and 2009 has had a significant and negative impact on airport finances. 收起