Q 01/05

A stubborn urban legend says one mile in every five of Interstate must be straight to serve as what?

A) An emergency runway

B) A tank parking area

C) A missile launch site

D) A troop assembly point

Answer · why

A) An emergency runway

An emergency runway was never part of the plan: no Interstate law has ever contained such a rule, however often the story is told.

Q 02/05

Which president signed the 1956 law that launched construction of the Interstate Highway System?

A) Franklin D. Roosevelt

B) Harry S. Truman

C) Dwight D. Eisenhower

D) John F. Kennedy

Answer · why

C) Dwight D. Eisenhower

Dwight D. Eisenhower had crossed the country with an Army truck convoy in 1919, a 62-day slog that convinced him America needed better roads.

Q 03/05

Which Interstate, running up the East Coast from Miami to Maine, crosses more states than any other?

A) I-75

B) I-81

C) I-85

D) I-95

Answer · why

D) I-95

I-95 crosses 15 states, yet until 2018 drivers had to leave it in New Jersey, where a planned stretch was never built.

Q 04/05

On which Hawaiian island are all of the state's Interstates, including H-1, H-2 and H-3, located?

A) Maui

B) Oahu

C) Kauai

D) Lanai

Answer · why

B) Oahu

Oahu's Interstates can never cross a state line. They were built to link the island's scattered military bases, including Pearl Harbor.

Q 05/05

Which road, nicknamed the Mother Road, was officially retired in 1985 after Interstates replaced it?

A) Route 1

B) Route 30

C) Route 50

D) Route 66

Answer · why

D) Route 66

Route 66 got that nickname from John Steinbeck's novel The Grapes of Wrath, which follows Dust Bowl migrants heading west along it.