This work develops an automatic, Constraint-Based Span Arrangement System for bridges (CBSAS), that generates economical span arrangements based on various constraints imposed by the user.

• 若桥梁长度较长且混合不同上部结构工法时，则规划者在进行跨距配置时难以完整地考量各项限制而迅速配置出合适之方案。