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On the sign:
רח דָּוִד רוֹטְלֵוִי תר"צ-תשנ"ט, 1930-1999 חבר מועצת העיר והנהלתה, ציר כלכלי בניו יורק, שותף להקמת משכן אומניות הבמה וממקימי התיאטרון האידי.
The sign actually consists of two arrowheads that form a hexagonal shape
Translation of the text on the sign: DAVID ROTLEVY st 1930-1999 A member of the City Council and its management, New York Economic delegate, co-founded of the Performing Arts Center and one of the founders of the Yiddish Theater.