When renting a car for vacation, personal, or business in the U.S. or worldwide, use your Institute of Transportation Engineers Membership to save 5% on leisure and up to 20% on business on any class of car. You can use your discount as often as you like – there’s no maximum savings or limit on rentals per year. 

Here’s how it works:

Call the National toll-free reservation number: 1-800-227-7368 and give them your ID number (5130760) or visit www.nationalcar.com