Question: what are some strengths of a truss bridge?
Answer: Extremely strong. The structure of interconnecting triangles means that the load-bearing capacity of truss bridges is huge. ... 
Uses materials effectively. ... 
Withstands extreme conditions. ... 
Roadways built on to the structure. ... 
Requires a lot of space. ... 
High maintenance costs. ... 
How good is your engineer? ... 
They're heavy.