Said farm-to-market road fund is hereby appropriated for and shall be used in the establishment, construction, reconstruction or improvement of the farm-to-market road system, including the drainage, grading, surfacing, resurfacing, construction of bridges and culverts, the elimination, protection, or improvement of railroad crossings, the acquiring of additional right-of-way and all other expenses incurred in the construction, reconstruction or improvement of said farm-to-market road system under this chapter.