Active Studies

Greenhouse Gas Inventory Update

The NJTPA prepared its first regional greenhouse gas (GHG) emissions inventory and forecast (I&F) report in 2011 and continues to prepare on-road transportation inventories and forecasts through the Air Quality Conformity Process. GHG emissions estimates are conducted with two different accounting methods:

• Direct GHG emissions are attributable to where they physically occur. Emissions are calculated at the regional and county levels and by road type and vehicle type.
• Consumption-based GHG emissions are based on every trip’s origin and destination jurisdiction. Half of each trip’s GHG emissions are attributed to the origin, and half are attributed to the destination. This method is best to understand how much on-road transportation activity is done by those living and working in a jurisdiction. Consumption emissions are calculated at the regional, county, and municipal level.

The NJTPA has prepared on-road transportation GHG emissions data for 2013, 2017, 2019, and the 2021 data will be prepared as part of the FY 2023 Air Quality Conformity process. The NJTPA is currently preparing a report about the 2019 data, expected to be completed in 2023.

The NJTPA is also exploring new methods to track on-road transportation GHG emissions data based on innovative new transportation modeling and monitoring technologies.

For more information, contact:
Zenon Tech-Czarny
Principal Planner, Environmental Planning
[email protected]