However, such streets shall not thereby become part of the State highway system but shall remain part of the municipal street system; but any such street may be made part of the State highway system as provided by Section 4-203.
605 ILCS 5/4-208
The Department may select streets in municipalities to form routes leading from business centers therein to State highways running through such municipalities and may erect and maintain suitable guide signs upon them
Laws 1959, p. 196.
Official source: Illinois General Assembly. Reproduced from public-domain Illinois statutes; confirm against the official source for the current text. Not legal advice.