In this context, precast construction presents social and environmental
benefits [23] and has proved worthwhile when high production
volumes are possible leading to the corresponding savings in costs and
construction time. Horvarth and Herndrickson [24] found that for the
initial construction of equivalent bridge girders for a particular location,
a steel-reinforced concrete bridge generally has lower environmental
effects than a steel bridge despite the fact that the uncertainty in bridge
design life and related data uncertainties make comparisons based on
annualized environmental effects difficult. Most Spanish road bridges
are constructed with precast prestressed concrete (PC)