四通八达 [- - bā dá]lead in all directions; accessible from all directions; extend in all directions; open on all sides (as a road); open out on all sides (as a passage); reaching out in all directions; with great facilities of communication:
•¶四通八达的流通网络 crisscross circulation network
•¶ 铁路四通八达遍布全国。 Railways ramified all over the country.