This summary report compares the data from the three California national parks measured and presents a simplified methodology for performing a generic emissions inventory on other parks. The specific objectives of this report include: 1. Compare the vehicle distributions from the three parks to determine whether vehicle distributions in different parks are significantly different from each other; 2. Compare the speed distributions from the three parks to determine whether driving cycles in different parks are significantly different from each other; and 3. Provide park personnel with a useful simplified emissions inventory tool to use in the generation of a generic park vehicular emissions inventory without committing the funding and time necessary to perform a more detailed measurement and analysis to be used for park planning purposes.