TripGen is a simple, easy-to-use tool that calculates trip generation based on Version 10 of the Institution of Transportation Engineer’s Trip Generation Manual. The analyst can select the desired independent variable and then calculate driveway volumes by using the rates or equations found in the Trip Generation Manual. Pass-by trips and internal capture trips for mixed-use developments (NCHRP 684) can also be taken into account. The software allows users to enter custom trip rates based on local or regional studies. Several reports are available for users to quickly review calculations. Future versions of the software will be integrated with Synchro, thus significantly reducing the time required to analyze traffic impacts.