The state road commissioner may construct, whenever he shall deem such construction expedient, but solely by means of or with the proceeds of the bridge revenue bonds hereinafter authorized, any toll bridge or bridges over and across any river or stream lying wholly or partly within the state or forming a boundary of the state, of such design or designs and at such place or places as may be approved by the state road commission. The commissioner may purchase within this state and within any adjoining state, solely from funds provided under the authority of this article, such lands, structures, rights of way, franchises, easements and other interests in lands, including lands under water and riparian rights of any person, railroad or other corporation or municipality or political subdivision, deemed necessary for the construction of any such bridge, upon terms and at such prices as may be considered by him to be reasonable and can be agreed upon between him and the owner thereof, title thereto to be taken in the name of the state.