All fines and pecuniary penalties which may be incurred under any of the provisions of this act shall, unless it be otherwise especially provided, be recoverable in the name of the commonwealth, at the instance of any person who will sue therefor, in the same manner as debts of like amount are recoverable, with costs of suit, and one moiety thereof shall be paid to the person suing for and recovering the same, and the residue shall be paid into the treasury of the respective townships, for the use of the supervisors of the public roads.