You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Detroit

Context:
I-94 (Edsel Ford Freeway) runs east–west through Detroit and serves Ann Arbor to the west (where it continues to Chicago) and Port Huron to the northeast. The stretch of the current I-94 freeway from Ypsilanti to Detroit was one of America's earlier limited-access highways. Henry Ford built it to link the factories at Willow Run and Dearborn during World War II. A portion was known as the Willow Run Expressway. The I-96 freeway runs northwest–southeast through Livingston, Oakland and Wayne counties and (as the Jeffries Freeway through Wayne County) has its eastern terminus in downtown Detroit.

Question:
A part of I-94 was an example of what type of highway?

limited-access