This is a pictograph of a track with points of darkness in three directions, and a point of light in the east. It is an ideograph for eastern route.
Illustrative Text Reference:
Mohenjo-daro: Seal: M-966 a: Sayid Ghulam Mustafa Shah and Asko Parpola, 1991: Corpus of Indus Seals and Inscriptions: Volume 2: Page 94: Collections in Pakistan: Suomalainen Tiedeakatemia.
Note the alignment, in this Indus sign, of the point of light at east with the left-hand side of the point of darkness at north. The position may have been chosen to avoid confusion with the
symbol for dusk.