ITE Flagship Resources
ITE’s Trip Generation Manual and Parking Generation Manual provide data for estimating travel demand and parking demand by land use. Choose the resource you need, purchase access, or open the web app if you’re already a user.
12th Edition / 2025
Estimate the number and type of trips generated by a land use
Already have access? Open ITETripGen App
6th Edition / 2023
Estimate parking demand generated by a land use
Already have access? Open ITEParkGen App
| Compare | Trip Generation Manual | Parking Generation Manual |
|---|---|---|
| Use It To | Estimate the number and type of trips generated by a land use | Estimate parking demand generated by a land use |
| Provides | Vehicle, person, and modal trip data (inbound/outbound) | Parking demand data by peak period, space use, and site type |
| Common Uses | Traffic impact studies, access management, environmental reviews, development approvals | Parking studies, zoning evaluations, and development approvals |
| Current Edition |
12th Edition (2025) – Access 11th Edition info here. |
6th Edition (2023) |
| Digital Access | ITETripGen Web App | ITEParkGen Web App |
ITE publishes two of the most trusted and widely referenced resources in the transportation profession: the Trip Generation Manual and the Parking Generation Manual. These companion publications provide essential data and guidance for estimating how land developments affect travel demand and parking needs. Used extensively by transportation engineers, planners, and public agencies—particularly throughout North America—these manuals help inform smarter, more efficient infrastructure and land use decisions.
While both resources focus on site-level analysis, they serve distinct purposes and are published independently. Use this page to explore each manual and find the right tools for your project.
Trip Generation Manual – Get details on the newly released 12th Edition, explore key updates, and access the ITETripGen web app. Access 11th Edition information here.
Parking Generation Manual – Learn how the 6th Edition supports data-driven parking analysis and explore the ITEParkGen web app.
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Submit Parking DataHave questions or need help selecting the right resource? Contact us at membership@ite.org or explore the ITE Technical Resources Library.