I wish this show would spend less time on each segment hyping the drama and revealing little bits of what happened and just use that time to more comprehensively cover what happened and how it occured, particularly from established regulations and such. They are great episodes and I love the engineering investigation but I want to know how about how these things happened, especially in cases were regulations and procedure should have prevented them.

The new bridge has been opened a couple of years ago, two years after the collapse of the old one

Why on earth would you demolish a bridge over a motorway and not have the traffic diverted for the night.

To @amkb4649 I absolutely concur. Point well made.

3:21 traffics lights? why didnt just add another circle like at the LEFT or the Adding channels from the main way could come from an an upward slope from below and where you put those traffics lights cold start the descending curve 29:00 how lucky the river was dry