Their are four barriers like the one pictured . see https://www.facebook.com/photo.php?fbid=1395507797146124&set=pcb.1691028660911034&type=3 for more photos.
It is a 250 m stretch of wide path 3m plus.
I understand the need to slow down some people who may ride downhill too fast and conflict with cyclists coming up hill or pedestrians .
But these barriers are over the top.