Page "Interstate 540 (Arkansas)" Paragraph 6

Another notable fact about I-540 in Arkansas is that the original I-540 spur running from I-540 to Oklahoma through Fort Smith was originally signed east – west, but with the construction of the new spur that runs north through the Northwest Arkansas metro area to Missouri the entire I-540 was resigned as a north – south road.

It is one of the few that has changed this way.