What is the legal speed limit in urban areas unless otherwise posted?

In Illinois, the legal speed limit in urban areas, unless otherwise posted, is 30 miles per hour. This limit is established to enhance safety in residential and business districts where there is likely to be increased pedestrian traffic, cyclists, and intersections. Urban areas are characterized by a greater density of people and vehicles, making it imperative to maintain a moderate speed to reduce the likelihood of accidents. The speed limit serves as a guideline to encourage drivers to adapt their speed in line with the conditions of the area they are driving in.

While there may be lower posted limits in specific zones, motorists should be aware that 30 miles per hour is the default speed limit in urban settings, ensuring that drivers remain vigilant and responsive to the environment around them.