Before a mall is established, a plan shall be formulated consistent with the city's comprehensive plan, including at least the area of the right-of-way between two intersecting streets and showing alternate routes outside the mall area upon which any vehicles excluded from using the mall may be accommodated; it may include a provision for on and off-street parking. After the plans have been prepared, the corporate authority shall hold a public hearing thereon, giving notice of time and place at least two weeks in advance of the hearing in a newspaper of general circulation in the city and as required by *chapter
42.32 RCW.