Highways: Contains exit lists and mileage logs for selected routes across the country.
Interstate Interchange Browser: Uses Google Maps to locate every interchange on the system. Includes exit numbers where available.
I_wiz: Lists exit information and presence of services along certain Interstates.
Nationwide Interstate Links: A directory of U.S. exit lists and highway pages, sorted by interstate, and linked directly to the exit lists.
North American Roadguides: Commercial exit service listing for various Interstates. Includes maps.
The Freeway Lists Page: Many locations around the country.
The U.S. Interstate Highway Strip Chart Project: Strip maps with information from signage plus other information. Requires XSLT translation.
Traveling in the Northwest: Coverage of most of the lengths of Interstate 5 and Interstate 90 throughout the country.
US Highway Interchange Browser: Covers Michigan and North Carolina.