GASCAP — the Greenhouse-Gas Assessment Spreadsheet for CAPital Projects — is a freely available Microsoft Excel based spreadsheet tool designed by the Alan M. Voorhees Transportation Center. GASCAP provides estimates of life-cycle greenhouse gas (GHG) emissions for many of the different components of a transportation construction project, as well as for maintenance activities. It is designed to be both user friendly and flexible allowing the user to specify inputs for a variety of different modules. GASCAP provides life-cycle emissions estimates for the major GHGs. These include carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), sulfur hexafluoride (SF6), and black carbon (BC). We also include estimates for the oxidation to CO2 of volatile organic compounds (VOC) and carbon monoxide (CO). The primary modules within GASCAP provide estimates of embodied emissions associated with a wide range of materials, construction equipment used on a project site, emissions associated with project mobilization, traffic disruption based on how the project is staged, and life-cycle maintenance over the lifetime of the project. Other modules include procedures for using recycled materials, induced travel effects, and rail capital projects. A future upgrade will include the effects of pavement deterioration on the GHG emissions of road users. GASCAP was originally developed under contract to the New Jersey Department of Transportation. Additional funding was provided by the University Regional Transportation Center for Region 2, and the Transit Cooperative Research Program supported the development and testing of the Rail module.
To download GASCAP, please fill out THIS ONLINE FORM. After submitting your contact information, click on the link to download the Excel Spreadsheet. All information will be kept private. If you use GASCAP for any project or program evaluation, we would greatly appreciate any feedback you may have in order to help us improve the product. Any reports generated from the use of GASCAP must also be provided and will be uploaded to this website.