DC 173
February 19, 2008 at 3:28 pmDC, bridges, signs

This little DC 173 mosaic is on the 9th St Tunnel going southbound under the National Mall. I can’t find any information online about the numbering of DC’s bridges and tunnels, but I’m sure there is some sort of system in place, because I have seen more of these markings on other infrastructre.
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February 19th, 2008 at 7:38 pm
I will keep my eye out for these. I bet there is some interesting history associated with them. I am in DC this week and my how wild the weather is. When I got here it was near 70. Within a few hours it was in the 50s, now snow tonight!