Pedestrian Tunnel

This photo didn't turn out as I hoped when I had taken it. What it shows is the entrance to a pesestrian tunnel that goes under the road to the right. A glass frame structure, similar to what you see above, can be found on the other side of the road. What can also be found near this structure is a normal surface pedestrian crossing -- marked by the area. Most pedestrians use the surface crossing and so I wonder what the point of building the tunnel was.

For what it is worth, the tunnel is nice -- well-lit, and I enjoyed walking through it.