Section 902.120  Standards Applicable to all Passenger Cars and  to Other Motor Vehicles with Gross Vehicle Weight (GVW) of 8,000 Pounds or Less

a)         This Section applies to all passenger cars regardless of weight and to other motor vehicles with a GVW of 8,000 pounds or less, except motorcycles and motor driven cycles.

b)         Operation of a motor vehicle subject to this Section at any time under any conditions of highway grade, load, acceleration or deceleration must not exceed the following limits:

1)         On highways with speed limits of 35 miles per hour or less, 74 dB(A), or 76 dB(A) when operating on a grade exceeding 3%, measured with fast meter response at 50 feet from the centerline of lane of travel;

2)         On highways with speed limits of more than 35 miles per hour, 82 dB(A), or 85 dB(A) if the vehicle is equipped with two or more snow or mud/snow tires, measured with fast meter response at 50 feet from the centerline of lane of travel.

(Source:  Amended at 42 Ill. Reg. 20474, effective November 1, 2018)