[wagglebee]

It is the exact opposite. Partial redundancy usually happens, however, total redundancy costs money and has to be designed in.

And it is entirely possible that what was considered redundancy when the bridge was built forty years ago would not even meet minimum standards today.

[the OlLine Rebel]

Uh, no. Engineers have known alot of this stuff for ages. There is a definition of “redundancy” and it hasn’t changed for centuries.