1. Form travelers - Better for continuous casting and span length
2. Launching gantry - More efficient for repetitive precast erection
3. Incremental launching - Reduces equipment costs
4. Cast-in-place falsework - Simplest for this span length

Explanation

For multiple repetitive spans over accessible terrain, launching gantries excel due to:

• High erection speed (1-2 spans per week possible)
• Parallel precasting operations
• Reduced skilled labor requirements on-site
• Lower total project cost for 15+ similar spans

Form travelers are more economical for longer spans (>100m) or over obstacles where falsework is impractical.

Learning Resources:

• fib Bulletin 81 (2017), Section 6.3 - Construction method selection for segmental bridges
• ASBI Segmental Bridge Construction Guide - Equipment selection and economic considerations