Any urban authority may agree with any person for the making of roads within their district for the public use through the lands and at the expense of such person, and may agree that such roads shall become and the same shall accordingly become on completion highways maintainable and repairable by the inhabitants at large within their district ; they may also, with the consent of two thirds of their number, agree with such person to pay, and may accordingly pay, any portion of the expenses of making such roads.