On this very site there are people who would tell you it is commonplace. I worked as a rigger and as a pile buck and bridge painter. This design was meant to be supported with cables from a center tower. To allow traffic, including pedestrians within 100ft is insane. Someone should go up for homicide or manslaughter. I would not have worked on that bridge, and I have done some very similar things but only with proper support. Those men on the upper part should have been harnessed to the man lifts or cranes. That bridge was not safe to be worked on, let alone driven under.
I suspect OSHA is all over it.
Fall protection Independent from the material supporting systems/cranes is generally required.
The 3-D space frame physical construction might not have matched the intended design. Without looking at calcs, I wouldn’t trust the eccentric truss without intended loading points being field placed at other loading points, especially if curing times for concrete are being rushed.
Eng-tips.com, in the past, has had a strong membership with competent Structural Engineering insight.
I wonder how the pivoted the 950Tn structure without inducing shear in the young concrete.