Funds for the purpose of carrying out the projects authorized in this chapter, including preliminary and final surveys, studies, plans and estimates relative hereto, and for the purpose of insular contributions under any applicable Federal program of road or highway aid, shall be made available in annual appropriations by the Legislature out of funds derived from the Federal internal revenues for emergency relief and essential public projects, or out of any other special fund or funds heretofore or hereafter established by the Legislature for the purpose of road or highway construction, maintenance or extension.
