No operator of a motor vehicle shall enter or leave the turnpike except through the tollplaza lanes (except in case of an emergency, and, in such case, such entrance or exit may be made only under the control and supervision of a police officer or a service vehicle from an official turnpike contract garage .) No operator of a motor vehicle on the turnpike shall commit any act or omission with intent to defraud or evade payment of a toll. Operators of a motor vehicle who are observed attempting to defraud or evade payment of a toll while on the turnpike may be cited by a police officer. Each instance in which the operator of a motor vehicle has failed to remit payment of a toll to the commission for more than thirty days after issuance of a notice by the commission to the operator that the toll is due shall be considered a willful attempt to defraud or evade payment of the toll. In each such instance, the commission may assess an additional fine of one hundred dollars against the operator of the motor vehicle who has failed to pay a toll for a period of more than thirty days.