事关南京都市圈交通，两条高速获批

Core Points - The approval of the preliminary design for two national highway projects marks a significant step towards full construction [1] - The G4231 Nanjing to Jiujiang Highway and G9904 Nanjing Urban Circle Ring Highway projects are crucial for regional connectivity and development [4][6] Group 1: G4231 Nanjing to Jiujiang Highway - The G4231 highway segment from He County to Wuwei is 68.8 kilometers long, connecting various towns and enhancing transportation along the Yangtze River [2] - This project will create a second highway link between Wuhu and Nanjing, improving interconnectivity and supporting regional development [4] - It is the first highway in Wuhu to be constructed through a public-private partnership and is part of the broader highway planning in Anhui Province [4] Group 2: G9904 Nanjing Urban Circle Ring Highway - The G9904 highway is part of the national highway network and spans approximately 288 kilometers, connecting multiple cities in Jiangsu and Anhui provinces [5] - The specific segment from Tianchang to Yizheng is 17.2 kilometers long with a total investment of 3.146 billion yuan [5] - The advancement of these projects is essential for implementing the Yangtze River Delta integration strategy and enhancing the highway network [6]