Hopefully I did not miss this in the transit and infrastructure posts but I noticed that they are changing the lights in the I-93 tunnel. I was headed south today and noticed that the lighting was much brighter than usual. Then I noticed individual lights instead of the longer connected ones (many of which were burnt out and dark). About three quarters of the tunnel had the new lights but the last section still had the older ones. I like the brighter lights but it shows how dirty the tiles have gotten over the years.