环渤海地区经济概貌环渤海地区各省南１９９２年主要经济指标：环渤海地区主要矿产资源概况：环渤海地区交通概况：环渤海地区综合运输网络的骨架基本形成。截止目前，公路里程１７．８万公里，占全国的１６．９％，其中高速公路里程占全国８７．４％，一级公路里程占全国... Economic overview of the Bohai Rim Bohai Sea provinces and autonomous regions in 1992 the main economic indicators: the main Bohai Sea area of ​​mineral resources Overview: the Bohai Sea traffic profile: the Bohai Rim comprehensive transport network skeleton formation. Up to now, the mileage of the highway is 178,000 km, accounting for 16.9% of the national total, of which the expressway mileage accounts for 87.4% of the national total, and the mileage of the first grade highway accounts for the whole country.