Question About Interstates With and Without BL's or BS's

[thenetwork]

What is the Longest Interstate WITHOUT a Business Loop or Business Spur?

Conversely, what is the Shortest interstate WITH a Business Route &/or Business Spur?

[TheHighwayMan3561]

Longest: I-81?
Shortest: Western I-86?

[cwf1701]

Longest: I-81?
Shortest: Western I-86?

Shortest interstate with a Business route is I-375 Detroit (BS-I-375 is unsigned in Downtown Detroit)

[Thing 342]

Longest: I-81?
Shortest: Western I-86?

I-64 is longer, at 964 miles.