Which of the following is specifically identified in the CDL manual as a blocked-vision hazard clue?

49 CFR 383.111(a)(13); AAMVA CDL Manual (nhcdm.pdf) Section 2.8.3, p. 2-19

A driver who can't see you is just as dangerous as one who sees you and ignores you, because they have no way to avoid you. Learning to spot these vehicles, loaded wagons, vans, frosted windows, lets you give them extra space and anticipate sudden lane changes or backing movements before they happen.