They have started many months ago with this and in the end it will be for many activities like Walking - Jogging - Cycling. 

It is only 1.9 km one way but if you do it three times up and down you got more than 11 km under your belt. 

Here some photos. 

First from the bridge going to the Airport, second from halfway back to that bridge and the third towards the bridge HW 1.

Last pic is a map.

 

  

Thanks for the info.  I was wondering what was going on.