三車道信(xin)號(hao)燈桿信(xin)號(hao)桿作(zuo)用(yong)

信(xin)(xin)(xin)號(hao)(hao)燈桿在道路交(jiao)通(tong)(tong)中主要用來支(zhi)(zhi)架交(jiao)通(tong)(tong)信(xin)(xin)(xin)號(hao)(hao)燈，使交(jiao)通(tong)(tong)信(xin)(xin)(xin)號(hao)(hao)燈位(wei)于交(jiao)通(tong)(tong)有利的位(wei)置。現實中人們只(zhi)重視交(jiao)通(tong)(tong)信(xin)(xin)(xin)號(hao)(hao)燈，但是信(xin)(xin)(xin)號(hao)(hao)燈桿作為(wei)交(jiao)通(tong)(tong)信(xin)(xin)(xin)號(hao)(hao)燈的支(zhi)(zhi)架，也起著非常(chang)重要的作用。