Hi Frank,
It is, as usual from yourself, a great picture.
If I may wander OT slightly, can I ask if anyone knows why north american* bridges of this typical size seem often to have roofs?
* Is it just US, or are some Canadian bridges also roofed?
It is a concept we don't have here in UK**, I assume it is something to do with weather extremes in winter, although I can't really see the logic in say, keeping snow off it, if the approaches are snowbound.
** Cue someone to show me I am wrong
TIA, Dave