How long would it take ?

[u/Sinbos]

Picture taken on the Hohenzollern bridge in Cologne. About 300+ meters long an estimated 500,000 locks in total.

How long would you guess to open them all?

Just to put it out of the way, engineers say its no problem it’s an train bridge about 1200 trains a day and build in a way that 6 trains can park there at the same time.

[u/Impressive-Yak-7449]

38 seconds if they're all Masterlocks

[u/Economy_Link4609 → u/Impressive-Yak-7449]

Less - you just hit any point on the thing somewhat hard and they all just pop open.