Adam McEwen’s escalator stairs, disassembled and scattered on Gagosian Gallery’s floor are readymades related to movement, though unlike Duchamp’s spinnable bike wheel mounted on a stool, they’re solidly in place. Dedicated to mass transit, their egalitarian nature contrasts an upside down image of a stretch limo, printed on cellulose sponge and hung on the wall behind. (On view at Gagosian Gallery’s 980 Madison Ave 5th floor gallery).

Adam McEwen, Assembly, escalator steps, variable dimensions, 2014.