The reader who sends this photo from this morning’s commute — on I-45 North near Canino — says it appears workers were “just putting up” this “Save the Dome” sign from OurAstrodome.org on the billboard this morning. “I drive by there every day and I don’t remember seeing it [before today],” the reader reports. The campaign ad in support of Harris County Proposition 2 on today’s ballot — which will determine the fate of the Astrodome — is visible going northbound on the freeway. [Previously on Swamplot] Photo: Swamplot inbox