If someone wants to destroy the overall view, there are no regulations to stop them. In the Japanese era they at least set norms for arcades, but on Taipei streets there are arcades at all different levels, with signs for businesses of all types.
日據時代起碼騎樓還規定一樣規格，今天同一條街上的騎樓卻高高低低，招牌各行其是。