highway geometric design

例句：

1. 1.The city is surrounded by a network of highways that connect it to the rest of the country.
   这个城市被一条条连接着城市的高速公路网包围。
2. 2. The driver was forced to take a detour on the highway due to heavy traffic.
   由于交通拥堵，司机被迫在高速公路上绕行。
3. 3.The construction of the new highway has greatly improved transportation in the area.
   新高速公路的建设极大地改善了该地区的交通状况。