Increasingly State DOTs, as part of state governments, are performing greenhouse gas (GHG) emission inventories of their operations to understand the manner and magnitude of their contribution to climate change, and to help them make informed GHG management decisions.
These Guidelines, entitled Greenhouse Gas Emission Inventory Methodologies for State Transportation Departments, provide GHG accounting procedures to help state DOTs prepare a GHG emission inventory of their operations as well as to increase consistency across state DOT inventories. “Operations” refers to the GHG emissions that occur through the daily activities associated with running a state DOT as a governmental body. These GHG emissions occur directly through the operation of state DOT buildings and fleet and indirectly through the products the state DOT consumes, the waste it generates, the individuals it employs, and the contracts it manages. The Guidelines overview GHG accounting basics, identifies emission sources relevant to state DOTs, points to methods for completing GHG emission estimates, provides approaches for obtaining or approximating data, and discusses resources and materials available to state DOTs to help them complete operational GHG inventories.
The final report is available here.