(a) Any railroad company, carrier or railroad violating the provisions of subsection (a), section two of this article is guilty of misdemeanor and, upon conviction thereof, shall be fined not less than $150; upon a second conviction occurring at the same crossing within one year thereafter, shall be fined not less than $250; and upon a third or subsequent conviction occurring at the same crossing within one year after the first conviction, shall be fined not less than $350.
(b) Any railroad company, carrier or railroad violating the provisions of subsection (b), section two of this article is guilty of a misdemeanor and, upon conviction thereof, shall be fined not less than $1,000; upon a second conviction occurring at the same crossing within one year thereafter, shall be fined not less than $2,500; and upon a third or subsequent conviction occurring at the same crossing within one year after the first conviction, shall be fined not less than $5,000.