Why didn't Changshu Li Antang build a viaduct?

1. Overhead construction requires a lot of capital investment, and subsequent maintenance and management also requires a certain cost. If the local government's budget is limited, it can't bear the cost of overhead construction, so it doesn't choose this way to improve traffic conditions.

2. Local urban planning pays more attention to other infrastructure construction, such as road widening and traffic improvement. In this case, the government will give priority to other projects instead of building elevated roads.