farmerbarleymow
I'm Petee's spirit animal
That is an odd aspect to it - maybe the authorities are worried about people marching across the bridge as that can cause a bridge to collapse (although it seems unlikely at this particular bridge).The bridge must be in very poor condition to warrant banning cycles and pedestrians.
Why Do Soldiers Break Stride On A Bridge?
Frequency of vibration is at work when swinging on a swing set or when soldiers march in unison or break stride across a bridge.
www.livescience.com