NZ Transport Agency Waka Kotahi – Project emissions estimation tool (PEET) is a greenhouse gas (GHG) emissions estimation tool that has been developed for use in the early stages of a land transport infrastructure project. PEET uses standard design examples and industry research to enable calculation of a high level estimation of the GHG emissions through the life cycle of a project, including:

• construction 
• operations and maintenance 
• vehicle use (by calculating enabled and/or avoided emissions through applying the Vehicle Emission Prediction Model (VEPM)).

PEET includes elements for state highways, local roads and rail and has been developed in collaboration with NZ Transport Agency Waka Kotahi (NZTA), Auckland Transport and KiwiRail.