Information maintained by the Legislative Reference Bureau
Updating the database of the Illinois Compiled Statutes (ILCS) is an ongoing process. Recent laws may not yet be included in the ILCS database, but they are found on this site as Public Acts soon after they become law. For information concerning the relationship between statutes and Public Acts, refer to the Guide.

Because the statute database is maintained primarily for legislative drafting purposes, statutory changes are sometimes included in the statute database before they take effect. If the source note at the end of a Section of the statutes includes a Public Act that has not yet taken effect, the version of the law that is currently in effect may have already been removed from the database and you should refer to that Public Act to see the changes made to the current law.

ROADS AND BRIDGES
(605 ILCS 5/) Illinois Highway Code.

605 ILCS 5/223

    (605 ILCS 5/223)
    (This Section was renumbered as Section 4-223 by P.A. 98-756.)
    Sec. 223. (Renumbered).
(Source: P.A. 98-442, eff. 1-1-14. Renumbered by P.A. 98-756, eff. 7-16-14.)

605 ILCS 5/Art. 4 Div. 3

 
    (605 ILCS 5/Art. 4 Div. 3 heading)
DIVISION 3. PLANNING AND PROGRAMMING

605 ILCS 5/4-303

    (605 ILCS 5/4-303) (from Ch. 121, par. 4-303)
    Sec. 4-303. Investigations made by the Department to determine the reasonably anticipated future need for federal aid highways and State highways may include, but shall not be limited to, the making of traffic surveys, the study of transportation facilities, research concerning the development of the several areas within this State and contiguous territory as affected by growth and changes in population and economic activity and the collection and review of data relating to all factors affecting the judicious planning of construction, improvement and maintenance of highways. Such investigations may also be conducted in cooperation with counties, municipalities, the United States, sister states, agencies of any such governments or other persons in pursuance of agreements to share the cost thereof. The Department is authorized to enter into such agreements.
(Source: Laws 1959, p. 196.)

605 ILCS 5/Art. 4 Div. 4

 
    (605 ILCS 5/Art. 4 Div. 4 heading)
DIVISION 4. CONSTRUCTION AND MAINTENANCE

605 ILCS 5/4-401

    (605 ILCS 5/4-401) (from Ch. 121, par. 4-401)
    Sec. 4-401. All State highways shall be constructed of sufficient widths to meet the requirements of the reasonably expected traffic thereon. The widths of travel ways shall be not less than 18 feet.
(Source: Laws 1959, p. 196.)

605 ILCS 5/4-402

    (605 ILCS 5/4-402) (from Ch. 121, par. 4-402)
    Sec. 4-402. When any State highway route through a municipality has been designated, the Department shall supervise any construction performed on such streets by the municipality with funds received from the State. Such construction shall be either with or without continuous grade separation and of such type and width as is required, in the judgment of the Department, to care for traffic and parking needs.
(Source: Laws 1959, p. 196.)

605 ILCS 5/4-403

    (605 ILCS 5/4-403) (from Ch. 121, par. 4-403)
    Sec. 4-403. Whenever local traffic conditions within any municipality through which or to the corporate limits of which any State highway is located, in the discretion of the Department, are such as to interfere with or impede through or State traffic, the Department is authorized and directed to locate and construct a durable hard-surfaced highway in the nature of a belt-line to connect State highway routes entering such municipality, so as to avoid congested traffic districts in the municipality. Such belt-line routes may be wholly without the corporate limits of the municipality or partly within and partly without such limits.
    The type of construction and width of such belt-line routes shall be sufficient to care for present or reasonably expected future needs of through or State traffic.
    Such belt-line routes shall be a part of the State highway system.
(Source: Laws 1959, p. 196.)

605 ILCS 5/4-404

    (605 ILCS 5/4-404) (from Ch. 121, par. 4-404)
    Sec. 4-404. By agreement between the Department and the proper authority of any municipality, park district or other municipal corporation, the construction of any street upon which a State highway route is located may be of greater width or different type than that determined upon by the Department. In such cases the excess cost of such construction shall be paid by the municipal corporation.
(Source: Laws 1959, p. 196.)

605 ILCS 5/4-405

    (605 ILCS 5/4-405) (from Ch. 121, par. 4-405)
    Sec. 4-405. The Department shall maintain all highways in the State highway system either with its own forces or pursuant to an agreement or contract entered into pursuant to this Code.
    In the course of its other maintenance work, the Department shall paint and maintain a line not less than 2 1/2 inches in width on the edges of uncurbed roadways of all State highways having an Illinois or U.S. route traffic marking and which carry an average daily traffic of more than 1000 vehicles. The Department may paint and maintain such lines on such other State highways as it deems desirable.
(Source: P.A. 78-283.)

605 ILCS 5/4-406

    (605 ILCS 5/4-406) (from Ch. 121, par. 4-406)
    Sec. 4-406. The Department is authorized to enter into contracts with any municipal corporation, terminable in the discretion of the Department, for the municipal corporation to maintain any State highway, or any part thereof, located within such municipal corporation, such maintenance to be under the supervision of the Department and at the expense of the State.
    The Department is authorized to enter into similar contracts with any county for the county to maintain any State highway, or any part thereof, which was originally constructed by the county, such maintenance to be under the supervision of the Department and at the expense of the State.
(Source: Laws 1959, p. 196.)

605 ILCS 5/4-406.1

    (605 ILCS 5/4-406.1) (from Ch. 121, par. 4-406.1)
    Sec. 4-406.1. The Department may surrender jurisdiction over the right-of-way and improvements of all or part of a State highway, street or road to a municipality by agreement as provided in Section 11-91.2-1 of the Illinois Municipal Code, as now or hereafter amended.
(Source: P.A. 85-1421.)

605 ILCS 5/4-407

    (605 ILCS 5/4-407) (from Ch. 121, par. 4-407)
    Sec. 4-407. The Department may temporarily close to traffic any portion of a State highway for the purpose of constructing, repairing or making improvements thereon. When a portion of a State highway with a route marking is so closed, the Department shall arrange with local authorities or otherwise to maintain efficient detours around the portion of the State highway which is closed and, except for an unanticipated emergency as determined by the Department, shall post notice of the detour locations on the Department's website no later than 10 days before the detour becomes active. Such detour shall be plainly and conspicuously marked with signs by which traffic may be guided around that part of the highway so closed.
(Source: P.A. 100-473, eff. 6-1-18.)