I'm wondering how I would write the text from this sign: https://www.google.com/search?q=one+lane+bridge+ahead&espv=2&biw=1920&bih=971&tbm=isch&imgil=vZtSNTCBlZ5LsM%253A%253ByQCS-ZpoUJCQAM%253Bhttp%25253A%25252F%25252Fwww.roadtrafficsigns.com%25252Fsigns%25252Fslow-one-lane-bridge-ahead-sign%25252Fsku-k-9061.aspx&source=iu&pf=m&fir=vZtSNTCBlZ5LsM%253A%252CyQCS-ZpoUJCQAM%252C_&usg=__w5953iKjlyCvYPMa8ViwA8kN1p0%3D&ved=0ahUKEwj39_WRtJ3LAhVV72MKHXx8DecQyjcIKQ&ei=r3PUVrfkMdXejwP8-LW4Dg#imgrc=vZtSNTCBlZ5LsM%3A In this situation: An hour and a half later he was nearing the bridge. Then he saw the familiar yellow sign ______
I'd do it with italics. Either: 1) Then he saw the familiar yellow sign: One Lane Bridge Ahead 2) Then he saw the familiar yellow sign, Slow: One Lane Bride Ahead I think I prefer the second one - indented blockquoting, because it allows for that implied colon you get on a lot of signage. But there are probably a bunch of ways to punctuate that. You probably could do it with quotes as well, but I think italics are cleaner.
An hour and a half later he was nearing the bridge, a yellow sign said "ONE LANE BRIDGE AHEAD" in big black letters.