Interstate 1 (I-1) is the recurring character in Intertropolis & Routeville. He is a male Interstate Highway shield who is obsessed with and good at video and internet games. He is one of the 23 members of the Main Interstate Highway signs living in the Main Highway Lounge of Intertropolis. He is one of the two only Main Interstate individuals in the group whose numbers ending with a "1" instead of a "0" and a "5". The other one is I-101.