Illinois Route 66

ILLINOIS ROUTE 66. Much of old Route 66 in Illinois was converted to a four-lane divided highway by 1940, bypassing the center of many small towns. When modern Interstate 55 was built in the 1970's, 66 for the most part returned to its roots as a two-lane, with the other two lanes abandoned and left to the elements. There are many of these old sections still to be found, like this one near Odell.