Propose that the vertical design should be made according to the marginal value of the relation of block width and block leveling slope, as well as the existing vertical design theory.

• 提出在现有竖向设计理论的基础上，还应按照街区宽度与街区整平坡度关系的界限值来考虑竖向设计方案，并提供一个选择竖向布置方式的重要判别式。