They did not cause it they contributed to it as the original source says: "This paper assesses the extent to which the construction of new limited access highw

They did not cause it they contributed to it as the original source says: "This paper assesses the extent to which the construction of new limited access highways has contributed to central city population decline." There were many factors involved in suburbanization. Emergence of a new middle class, white flight, proliferation of cars (thus highways have been built) to name just a few.