All front yards must face upon a dedicated public street, provided that, on streets less than 50 feet in width, the required front yard shall be increased by 1/2 the difference between the width of the street and 50 feet, and provided that any lot which abuts a street with a proposed right-of-way greater than 50 feet in width as shown on the Master Plan of the Borough of Wharton shall have a front yard setback measured from the nearest line shown on the Master Plan of the Borough of Wharton.