One goal of someone into roads is to drive coast-to-coast in pursuit of driving as many highways as possible. The "clinched" Interstate page is designed to show you, the reader, where we've been during our years of traveling. Our ultimate goal is to drive every mile of the interstate system.
Note: Red shields indicate Future Interstates, Grey shields indicate unsigned Interstates, Black shields indicate terminated Interstates (highway must have been traveled upon while actually signed as the said Interstate). Green shields are also included for the three full Business Loop Freeways (80 in California, 40 in North Carolina, and 85 in South Carolina). These routes are not required to complete all of an state's Interstate mileage. Yellow backgrounds indicate that all of a state's mileage has been driven or rode upon (this requires just the signed and unsigned Interstates currently included in the Federal Highway Administration Route Log and Finder List; future, terminated, and business routes are not required for this field).
Where did the concept of the word "clinched" originate? Originally coined by Alex Nitzman and Cary B. Todd, the word is derived from professional sports where a team will "clinch" its division title or conference title. Hence we have Clinched Interstates...