福州交(jiao)(jiao)(jiao)(jiao)通(tong)(tong)信號燈(deng),是指設置在道路(lu)交(jiao)(jiao)(jiao)(jiao)叉路(lu)口(kou)(kou)(kou),用(yong)以指揮交(jiao)(jiao)(jiao)(jiao)叉路(lu)口(kou)(kou)(kou)通(tong)(tong)行(xing)的(de)(de)燈(deng)光設備。交(jiao)(jiao)(jiao)(jiao)通(tong)(tong)信號燈(deng)對車輛(liang)和行(xing)人實行(xing)或停或行(xing)交(jiao)(jiao)(jiao)(jiao)替(ti)的(de)(de)繼(ji)續式(shi)指揮疏導,把不(bu)同方向的(de)(de)交(jiao)(jiao)(jiao)(jiao)通(tong)(tong)參與者從(cong)時間和空間上隔開,先后通(tong)(tong)行(xing),避(bi)免相(xiang)互干擾,使處在相(xiang)互矛盾的(de)(de)交(jiao)(jiao)(jiao)(jiao)通(tong)(tong)環境(jing)中的(de)(de)車輛(liang)和行(xing)人有秩序地通(tong)(tong)過交(jiao)(jiao)(jiao)(jiao)叉路(lu)口(kou)(kou)(kou),以保障交(jiao)(jiao)(jiao)(jiao)通(tong)(tong)安(an)全和暢通(tong)(tong)。