This symbol combines the noun road with the noun area. The area is marked with the verb to obscure or to hide, which is used as an adjective. In other words, the area is private. Hence, this symbol translates as 'road in the citadel'.
Illustrative Text Reference:
Harappa: Tablet in bas-relief: H-1981 B: Asko Parpola, B. M. Pande, and Petteri Koskikallio, 2010: Corpus of Indus Seals and Inscriptions: Volume 3,1: Page 271: New material, untraced objects, and collections outside India and Pakistan: Suomalainen Tiedeakatemia.
Comment:
Tablet H-1981 may have been a permit for goods to enter the citadel.
Image Credit:
Citadel Road: Lynn Fawcett, 2018.