(a) The consulting engineer and the State Geologist shall make such investigations and reports as the State Highway Commission may from time to time require.
(b) They shall be especially charged with the study of the road materials of the state, their location, relative value, cost, and durability, and the cost of transporting road materials to other parts of the state.
(c) They shall make such experiments and tests as they may be able with the equipment of the University of Arkansas and such funds as may be provided.
(d) They shall embody all the information gathered as to road materials in such published reports as may be convenient for distribution.