There is hereby created a primary road scenic and improvement fund which shall include and embrace all funds hereafter credited thereto. Said fund shall be administered by the department and shall be used for the construction, reconstruction, improvement and maintenance of roadside safety rest areas and scenic beautification areas along the primary roads of the state including the acquisition of such property and property rights needed to accomplish said purposes. Part or all of said fund may be used to match federal allotments made available to the state of Iowa for the purposes provided in this section and to this end, the department is empowered on behalf of the state to enter into any agreements or contracts with the duly constituted federal authorities in order to secure the benefit of all present and future federal allotments.