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Illinois Speed Limit Laws

Illinois Speed Limit Laws

Illinois Speed Limit LawsSpeeding is one of the leading contributors to vehicle crashes. You may drive at the maximum allowable speed only under safe conditions. For safety purposes, a minimum
speed limit may be posted along certain roadways. When minimum limits are not posted, drivers should not drive so slow as to create an interference with the normal movement of traffic. The following speed limits apply, unless otherwise posted:

  • Interstate tollways, freeways and some four-lane highways — 65 mph
  • Most other highways and rural areas — 55 mph
  • City/Town Areas — 30 mph
  • Alleys — 15 mph
  • School Zones — 20 mph (on school days between 7 a.m. and 4 p.m. when children
    are present and signs are posted).

A driver must take care to slow down when approaching and crossing an intersection,
going around a curve, approaching the top of a hill or traveling on a narrow and winding roadway. Drivers must be aware that there may always be dangers present due to
pedestrians, traffic, weather, mechanical problems or road conditions.

Construction Zones

When approaching or entering a highway construction or maintenance area (also
known as work zones), Illinois law requires motorists to slow down, discontinue wireless/cellphone use, yield to any authorized vehicles or workers in the area, change to
a lane away from the workers when possible, and proceed with caution.

Emergency/Maintenance Vehicles

When approaching a stationary emergency/maintenance vehicle using visual signals,
Illinois law requires motorists to yield, change to a lane away from the emergency
workers when possible, and proceed with caution. If a lane change is not possible,
reduce speed and proceed with caution. Illinois law prohibits the use of wireless/cellphones within 500 feet of an emergency scene, except in certain circumstances.
When being approached by an emergency vehicle using audible and visual signals
(lights and/or sirens), Illinois law requires motorists to immediately pull to the right side
of the road and allow the emergency vehicle to pass. In some cases a complete stop
may be necessary to allow the emergency vehicle to pass. If stopped at an intersection
with two-way traffic, remain stopped until the emergency vehicle passes.

School Zones

When approaching a marked school zone between 7 a.m. and 4 p.m., on days when
school is in operation and children are present, a driver must discontinue wireless/cellphone use, reduce speed to 20 mph, and stop and yield the right-of-way to any children
or adults in the crosswalk area.

Funeral Processions

Motorists encountering a funeral procession must yield the right-of-way to all vehicles in the procession. Motorists should NOT drive between vehicles in an organized
funeral procession, except when required to do so by a law enforcement officer; join
a funeral procession for the purpose of securing the right-of-way; or attempt to pass
any vehicle in an organized funeral procession, except where a passing lane has been
specifically provided.

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