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Illinois Compiled Statutes

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.

VEHICLES
(625 ILCS 5/) Illinois Vehicle Code.

625 ILCS 5/11-507

    (625 ILCS 5/11-507)
    Sec. 11-507. Supervising a minor driver while under the influence of alcohol, other drug or drugs, intoxicating compound or compounds or any combination thereof.
    (a) A person shall not accompany or provide instruction, pursuant to subsection (a) of Section 6-107.1 of this Code, to a driver who is a minor and driving a motor vehicle pursuant to an instruction permit under Section 6-107.1 of this Code, while:
        (1) the alcohol concentration in the person's blood
    
or breath is 0.08 or more based on the definition of blood and breath units in Section 11-501.2 of this Code;
        (2) under the influence of alcohol;
        (3) under the influence of any intoxicating compound
    
or combination of intoxicating compounds to a degree that renders the person incapable of properly supervising or providing instruction to the minor driver;
        (4) under the influence of any other drug or
    
combination of drugs to a degree that renders the person incapable of properly supervising or providing instruction to the minor driver;
        (5) under the combined influence of alcohol, other
    
drug or drugs, or intoxicating compound or compounds to a degree that renders the person incapable of properly supervising or providing instruction to the minor driver; or
        (6) there is any amount of a drug, substance, or
    
compound in the person's breath, blood, or urine resulting from the unlawful use or consumption of cannabis listed in the Cannabis Control Act, a controlled substance listed in the Illinois Controlled Substances Act, an intoxicating compound listed in the Use of Intoxicating Compounds Act, or methamphetamine as listed in the Methamphetamine Control and Community Protection Act.
    (b) A person found guilty of violating this Section is guilty of an offense against the regulations governing the movement of vehicles.
(Source: P.A. 96-1237, eff. 1-1-11.)

625 ILCS 5/Ch. 11 Art. VI

 
    (625 ILCS 5/Ch. 11 Art. VI heading)
ARTICLE VI. SPEED RESTRICTIONS

625 ILCS 5/11-601

    (625 ILCS 5/11-601) (from Ch. 95 1/2, par. 11-601)
    Sec. 11-601. General speed restrictions.
    (a) No vehicle may be driven upon any highway of this State at a speed which is greater than is reasonable and proper with regard to traffic conditions and the use of the highway, or endangers the safety of any person or property. The fact that the speed of a vehicle does not exceed the applicable maximum speed limit does not relieve the driver from the duty to decrease speed when approaching and crossing an intersection, approaching and going around a curve, when approaching a hill crest, when traveling upon any narrow or winding roadway, or when special hazard exists with respect to pedestrians or other traffic or by reason of weather or highway conditions. Speed must be decreased as may be necessary to avoid colliding with any person or vehicle on or entering the highway in compliance with legal requirements and the duty of all persons to use due care.
    (a-5) For purposes of this Section, "urban district" does not include any interstate highway as defined by Section 1-133.1 of this Code which includes all highways under the jurisdiction of the Illinois State Toll Highway Authority.
    (b) No person may drive a vehicle upon any highway of this State at a speed which is greater than the applicable statutory maximum speed limit established by paragraphs (c), (d), (e), (f) or (g) of this Section, by Section 11-605 or by a regulation or ordinance made under this Chapter.
    (c) Unless some other speed restriction is established under this Chapter, the maximum speed limit in an urban district for all vehicles is:
        1. 30 miles per hour; and
        2. 15 miles per hour in an alley.
    (d) Unless some other speed restriction is established under this Chapter, the maximum speed limit outside an urban district for any vehicle is (1) 65 miles per hour for all or part of highways that are designated by the Department, have at least 4 lanes of traffic, and have a separation between the roadways moving in opposite directions and (2) 55 miles per hour for all other highways, roads, and streets.
    (d-1) Unless some other speed restriction is established under this Chapter, the maximum speed limit outside an urban district for any vehicle is (1) 70 miles per hour on any interstate highway as defined by Section 1-133.1 of this Code which includes all highways under the jurisdiction of the Illinois State Toll Highway Authority; (2) 65 miles per hour for all or part of highways that are designated by the Department, have at least 4 lanes of traffic, and have a separation between the roadways moving in opposite directions; and (3) 55 miles per hour for all other highways, roads, and streets. The counties of Cook, DuPage, Kane, Lake, Madison, McHenry, St. Clair, and Will may adopt ordinances setting a maximum speed limit on highways, roads, and streets that is lower than the limits established by this Section.
    (e) In the counties of Cook, DuPage, Kane, Lake, McHenry, and Will, unless some lesser speed restriction is established under this Chapter, the maximum speed limit outside an urban district for a second division vehicle designed or used for the carrying of a gross weight of 8,001 pounds or more (including the weight of the vehicle and maximum load) is 60 miles per hour on any interstate highway as defined by Section 1-133.1 of this Code and 55 miles per hour on all other highways, roads, and streets.
    (e-1) (Blank).
    (f) Unless some other speed restriction is established under this Chapter, the maximum speed limit outside an urban district for a bus is:
        1. 65 miles per hour upon any highway which has at
    
least 4 lanes of traffic and of which the roadways for traffic moving in opposite directions are separated by a strip of ground which is not surfaced or suitable for vehicular traffic, except that the maximum speed limit for a bus on all highways, roads, or streets not under the jurisdiction of the Department or the Illinois State Toll Highway Authority is 55 miles per hour;
        1.5. 70 miles per hour upon any interstate highway as
    
defined by Section 1-133.1 of this Code outside the counties of Cook, DuPage, Kane, Lake, McHenry, and Will; and
        2. 55 miles per hour on any other highway.
    (g) (Blank).
(Source: P.A. 98-511, eff. 1-1-14; 98-1126, eff. 1-1-15; 98-1128, eff. 1-1-15; 99-78, eff. 7-20-15.)

625 ILCS 5/11-601.5

    (625 ILCS 5/11-601.5)
    Sec. 11-601.5. Driving 26 miles per hour or more in excess of applicable limit.
    (a) A person who drives a vehicle upon any highway of this State at a speed that is 26 miles per hour or more but less than 35 miles per hour in excess of the applicable maximum speed limit established under this Chapter or a local ordinance commits a Class B misdemeanor.
    (b) A person who drives a vehicle upon any highway of this State at a speed that is 35 miles per hour or more in excess of the applicable maximum speed limit established under this Chapter or a local ordinance commits a Class A misdemeanor.
(Source: P.A. 98-511, eff. 1-1-14.)

625 ILCS 5/11-602

    (625 ILCS 5/11-602) (from Ch. 95 1/2, par. 11-602)
    Sec. 11-602. Alteration of limits by Department. Whenever the Department determines, upon the basis of an engineering and traffic investigation concerning any highway for which the Department has maintenance responsibility, that a maximum speed limit prescribed in Section 11-601 of this Chapter is greater or less than is reasonable or safe with respect to the conditions found to exist at any intersection or other place on such highway or along any part or zone thereof, the Department shall determine and declare a reasonable and safe absolute maximum speed limit applicable to such intersection or place, or along such part or zone. However, such limit shall conform with the maximum speed limit restrictions provided for in Section 11-601 of this Code. Where a highway under the Department's jurisdiction is contiguous to school property, the Department may, at the school district's request, set a reduced maximum speed limit for student safety purposes in the portion of the highway that faces the school property and in the portions of the highway that extend one-quarter mile in each direction from the opposite ends of the school property. A limit determined and declared as provided in this Section becomes effective, and suspends the applicability of the limit prescribed in Section 11-601 of this Chapter, when appropriate signs giving notice of the limit are erected at such intersection or other place, or along such part or zone of the highway. Electronic speed-detecting devices shall not be used within 500 feet beyond any such sign in the direction of travel; if so used in violation hereof, evidence obtained thereby shall be inadmissible in any prosecution for speeding. However, nothing in this Section prohibits the use of such electronic speed-detecting devices within 500 feet of a sign within a special school speed zone indicating such zone, conforming to the requirements of Section 11-605 of this Act, nor shall evidence obtained thereby be inadmissible in any prosecution for speeding provided the use of such device shall apply only to the enforcement of the speed limit in such special school speed zone.
(Source: P.A. 98-511, eff. 1-1-14.)

625 ILCS 5/11-603

    (625 ILCS 5/11-603) (from Ch. 95 1/2, par. 11-603)
    Sec. 11-603. Alteration of limits by Toll Highway Authority. Whenever the Illinois State Toll Highway Authority determines, upon the basis of an engineering and traffic investigation concerning a toll highway under its jurisdiction, that a maximum speed limit prescribed in Section 11-601 of this Chapter is greater or less than is reasonable or safe with respect to conditions found to exist at any place or along any part or zone of such highway, the Authority shall determine and declare by regulation a reasonable and safe absolute maximum speed limit at such place or along such part or zone, and the speed limit shall conform with the maximum speed limit restrictions provided for in Section 11-601 of this Code. A limit so determined and declared becomes effective, and suspends the application of the limit prescribed in Section 11-601 of this Chapter, when (a) the Department concurs in writing with the Authority's regulation, and (b) appropriate signs giving notice of the limit are erected at such place or along such part or zone of the highway. Electronic speed-detecting devices shall not be used within 500 feet beyond any such sign in the direction of travel; if so used in violation hereof, evidence obtained thereby shall be inadmissible in any prosecution for speeding.
(Source: P.A. 98-511, eff. 1-1-14.)

625 ILCS 5/11-604

    (625 ILCS 5/11-604) (from Ch. 95 1/2, par. 11-604)
    Sec. 11-604. Alteration of limits by local authorities.
    (a) Subject to the limitations set forth in this Section, the county board of a county may establish absolute maximum speed limits on all county highways, township roads and district roads as defined in the Illinois Highway Code, except those under the jurisdiction of the Department or of the Illinois State Toll Highway Authority, as described in Sections 11-602 and 11-603 of this Chapter; and any park district, city, village, or incorporated town may establish absolute maximum speed limits on all streets which are within its corporate limits and which are not under the jurisdiction of the Department or of such Authority, and for which the county or a highway commissioner of such county does not have maintenance responsibility.
    (b) Whenever any such park district, city, village, or incorporated town determines, upon the basis of an engineering or traffic investigation concerning a highway or street on which it is authorized by this Section to establish speed limits, that a maximum speed limit prescribed in Section 11-601 of this Chapter is greater or less than is reasonable or safe with respect to the conditions found to exist at any place or along any part or zone of such highway or street, the local authority or park district shall determine and declare by ordinance a reasonable and safe absolute maximum speed limit at such place or along such part or zone, which:
        (1) Decreases the limit within an urban district, but
    
not to less than 20 miles per hour; or
        (2) Increases the limit within an urban district, but
    
not to more than 55 miles per hour; or
        (3) Decreases the limit outside of an urban district,
    
but not to less than 35 miles per hour, except as otherwise provided in subparagraph 4 of this paragraph; or
        (4) Decreases the limit within a residence district,
    
but not to less than 25 miles per hour, except as otherwise provided in subparagraph 1 of this paragraph.
    The park district, city, village, or incorporated town may make such limit applicable at all times or only during certain specified times. Not more than 6 such alterations shall be made per mile along a highway or street; and the difference in limit between adjacent altered speed zones shall not be more than 10 miles per hour.
    A limit so determined and declared by a park district, city, village, or incorporated town becomes effective, and suspends the application of the limit prescribed in Section 11-601 of this Chapter, when appropriate signs giving notice of the limit are erected at the proper place or along the proper part or zone of the highway or street. Electronic speed-detecting devices shall not be used within 500 feet beyond any such sign in the direction of travel; if so used in violation of this Section evidence obtained thereby shall be inadmissible in any prosecution for speeding. However, nothing in this Section prohibits the use of such electronic speed-detecting devices within 500 feet of a sign within a special school speed zone indicating such zone, conforming to the requirements of Section 11-605 of this Act, nor shall evidence obtained thereby be inadmissible in any prosecution for speeding provided the use of such device shall apply only to the enforcement of the speed limit in such special school speed zone.
    (c) A county engineer or superintendent of highways may submit to the Department for approval, a county policy for establishing altered speed zones on township and county highways based upon engineering and traffic investigations.
    (d) Whenever the county board of a county determines that a maximum speed limit is greater or less than is reasonable or safe with respect to the conditions found to exist at any place or along any part or zone of the highway or road, the county board shall determine and declare by ordinance a reasonable and safe absolute maximum speed limit at that place or along that part or zone. However, the maximum speed limit shall not exceed 55 miles per hour. Upon receipt of an engineering study for the part or zone of highway in question from the county engineer, and notwithstanding any other provision of law, the county board of a county may determine and declare by ordinance a reduction in the maximum speed limit at any place or along any part or zone of a county highway whenever the county board, in its sole discretion, determines that the reduction in the maximum speed limit is reasonable and safe. The county board may post signs designating the new speed limit. The limit becomes effective, and suspends the application of the limit prescribed in Section 11-601 of this Chapter, when appropriate signs giving notice of the limit are erected at the proper place or along the proper part of the zone of the highway. Electronic speed-detecting devices shall not be used within 500 feet beyond any such sign in the direction of travel; if so used in violation of this Section, evidence obtained thereby shall be inadmissible in any prosecution for speeding. However, nothing in this Section prohibits the use of such electronic speed-detecting devices within 500 feet of a sign within a special school speed zone indicating such zone, conforming to the requirements of Section 11-605 of this Act, nor shall evidence obtained thereby be inadmissible in any prosecution for speeding provided the use of such device shall apply only to the enforcement of the speed limit in such special school speed zone.
(Source: P.A. 95-574, eff. 6-1-08; 95-788, eff. 8-7-08.)