This is a composite Indus sign in which the noun tea is placed in the middle of a road. Hence, it is the proper name Tea Road.
Illustrative Text Reference:
Chanhu-daro: Seal: C-32 a: Jagat Pati Joshi and Asko Parpola, 1987: Corpus of Indus Seals and Inscriptions: Volume 1: Page 335: Collections in India: Suomalainen Tiedeakatemia.
Comments:
There is only one extant example of this Indus sign. The sign is incorporated into an inscription on a round seal. The round shape is not very common amongst Indus seals.
Image Credit:
Indus Script Sign Number 401: Sign List of the Indus Script: Iravatham Mahadevan, 1977: The Indus Script: Texts, Concordance and Tables: The Director General Archaeological Survey of India.