The Indus Dictionary Project
In this symbol, the verb to drive is placed over the diagram of a perimeter wall. Hence, it is the noun drivers' area.
Dholavira: Seal: SI. Number: 217: Acc. Number: 51582 (NB. The photograph is of the seal. Therefore, the inscription would be the mirrored image of that seen in the photograph.): R.S. Bisht, 2015: 8.2.3 Details of Individual Seals: Excavations at Dholavira (1989-90 to 2004-2005), p. 305: https://www.scribd.com/document/262316120/Excavations-at-Dholavifra-1989-2005-RS-Bisht-2015: Accessed: 11 February, 2019.
Mohenjo-daro: Seal: M-1262 a: Sayid Ghulam Mustafa Shah and Asko Parpola, 1991: Corpus of Indus Seals and Inscriptions: Volume 2: Page 159: Collections in Pakistan: Suomalainen Tiedeakatemia.
Nouns in the Indus script are ambiguous as to number. Singular or plural is determined from the context.
Drivers had to wait for passengers; their turn in the loading bay; or, to pass through border controls. Therefore, this symbol referred to the equivalent of the modern day car park or lorry park.
Drivers' Area: Lynn Fawcett, 2019.