TRB’s Airport Cooperative Research Program (ACRP) Report 44: A Guidebook for the Preservation of Public-Use Airports describes why public-use airports close and identifies measures and strategies that can be undertaken to potentially help preserve and prevent an airport closure.

Ch. 1. Introduction -- ch. 2. Airport business plan -- ch. 3. Airport business planning process -- ch. 4. Preparing the elements of an airport business plan -- ch. 5. Implementation -- ch. 6. Airport and market -- ch. 7. Organization -- ch. 8. Operations -- ch. 9. Marketing -- ch. 10. Aviation products, services, and facilities -- ch. 11. Financial -- Glossary of terms and acronyms -- Bibliography.

Does the identification number 60 indicate a toxic substance or a flammable solid, in the molten state at an elevated temperature? Does the identification number 1035 indicate ethane or butane? What is the difference between natural gas transmission pipelines and natural gas distribution pipelines? If you came upon an overturned truck on the highway that was leaking, would you be able to identify if it was hazardous and know what steps to take? Questions like these and more are answered in the Emergency Response Guidebook. Learn how to identify symbols for and vehicles carrying toxic, flammable, explosive, radioactive, or otherwise harmful substances and how to respond once an incident involving those substances has been identified. Always be prepared in situations that are unfamiliar and dangerous and know how to rectify them. Keeping this guide around at all times will ensure that, if you were to come upon a transportation situation involving hazardous substances or dangerous goods, you will be able to help keep others and yourself out of danger. With color-coded pages for quick and easy reference, this is the official manual used by first responders in the United States and Canada for transportation incidents involving dangerous goods or hazardous materials.