The councils of said city are hereby authorized to widen to a width not exceeding one hundred feet, any of the streets of said city that may be occupied by the route of said railroad so extended and to cause the same to be laid out upon the plans of said city of said increased width, the damages therefor to be ascertained in the manner now provided by law in reference to the opening of the streets of said city: Provided, That the said company shall first give security to said city for the payment of all such damages.
53 P.S. § 16423