This highway followed the current alignment east of Sears Point, before diverting northeast along present-day Route 121.

Prior to the construction of the freeway, Route 146 used present-day Route 246 and Route 146A.

Popular myth also states that it is named after the Merry Den tavern that may have been located near present-day Route 5.

But Peter Grubb's can still be seen on present-day Route 322.

Du Bois was born on February 23, 1868, located on where present-day Route 23 would run.

Dublin school was a part of the public school system in 1867 with a one-room building on present-day Route 136 across from the present school.

In 1800 Charles Beavers donated land for a Methodist house of worship (on present-day Route 136).

It started at the intersection of present-day Route 179 and Route 81.

It went north along Route 179 to present-day Route 77.

The first coal mine in Illinois was opened on the south bank of the Big Muddy River near the present-day Route 127 Bridge.