The moneys derived from the sale of bonds shall be turned over to and remain as a fund in the hands of the county treasurer, to be used only for the purpose of putting and keeping such road and lighting plant in good repair and condition, and shall be drawn upon warrants signed by the president and secretary of the boulevard commission. The board of chosen freeholders shall have no control over such funds, but shall raise them in the manner hereinbefore provided upon the requisition of the boulevard commissioners.