Some Interstates don't cross state lines but are still part of the system. 8 How can I recognize an Interstate? Interstates have shield-shaped blue and red signs with a number. 7 Are Interstates safer than other roads? Due to design standards, Interstates tend to have lower accident ...
Let's take a closer look at the digits on those red, white, and blue shield-shaped signs. Thenumber of digits in the nametells you whether an interstate connects more than one city, or if it serves a single metropolitan area. Interstates with one or two digits (e.g., I-95) interco...