The model is a credit/deficit demand-supply model that calculates credit/deficit generation based on volume of different types of fuel consumed. The model has an objective to minimize the overall spending of obligated parties in the program whilst meeting program objectives which is recruited to forecast the credit prices. The model simulates vehicle sales, retirement, and use based on different economic and technical parameters. Vehicles are classified based on their weight classes (LDV, MHDV, and HDV). For each class, the model generates results for fuel demand projections until 2035 broken into several fuel categories: gasoline, gasoline substitute such as ethanol and drop-in renewable gasoline; diesel; diesel substitutes such as biodiesel (BD) and renewable diesel (RD); compressed natural gas (CNG); liquefied natural gas (LNG); electricity; and hydrogen.  This version of the model was developed following the 45-day comment period in the CA LCFS rulemaking process. It allows for the possibility of multiple CI reduction target scenarios. Click here for the Explainer!