 U.S. Route 41 passes through the eastern part of Knollwood, though several sections fall within the boundaries of Lake Bluff.It leads north to Gurnee and south to Highland Park.Portions of Illinois Route 43 (Waukegan Road) and Illinois Route 176 (Rockland Road) are also located within Knollwood, although the actual intersection of the two roads lies along the Lake Bluff/Knollwood boundary.