No person shall willfully fail or refuse to comply with any lawful order or direction of any police officer, fireman, person authorized by a law authority to direct traffic, or school crossing guard invested by law with authority to direct, control, or regulate traffic. Any person convicted of violating this section is guilty of a petty offense and shall be subject to a mandatory fine of $150.
(ILCS Ch. 625, Act 5, § 11-203) Penalty, see § 70.99