Will County Board Approves New 30 MPH Speed Limit for Frankfort Township Road

Will County Board Regular Meeting | October 16, 2025

Article Summary: The Will County Board approved a new 30 MPH speed limit for a section of 78th Avenue in Frankfort Township, following a traffic study conducted by the Will County Division of Transportation. The change is being made to improve safety on the residential roadway.

Frankfort Township Speed Limit Key Points:

• The new 30 MPH speed limit will be established on 78th Avenue from North Avenue south to 830 feet north of US Route 30.

• The traffic study showed a prevailing speed of 33 MPH, warranting a reduction from the statutory 55 MPH limit for unincorporated roads.

The Will County Board on Thursday, October 16, 2025, authorized the establishment of a new 30 MPH speed limit on a portion of 78th Avenue in Frankfort Township. The ordinance was passed to address safety concerns on the roadway, which is under the maintenance responsibility of the Frankfort Township Road District.

The altered speed zone covers a 0.33-mile stretch of 78th Avenue, running from North Avenue south to a point approximately 830 feet north of U.S. Route 30.

The change follows an engineering and traffic investigation by the Will County Division of Transportation. According to the speed zone study completed in August 2025, the 85th percentile speed—a standard measure indicating the speed at or below which 85% of vehicles travel—was found to be 33 MPH. The study recommended establishing a 30 MPH limit, noting that it was “warranted.”

Without this designated speed zone, the road would be subject to the default statutory limit for unincorporated areas, which is typically 55 MPH. The new ordinance allows for the posting of 30 MPH signs to create a safer environment for residents and drivers in the area. The measure was approved as part of the Public Works & Transportation Committee’s consent agenda.