From the plinth of the acropolis, it is a short distance to the lower town. The lower town contains a commercial and residential area. The arterial streets running from north to south were flanked by shops, merchant dwellings and artisan's workshops.
The bead factories, situated where the 8th street of the commercial area and the 5th street of the residential area meet, comprised the main industry of the Harappans.
The most unique aspect of planning during the Indus Valley civilization was the system of underground drainage. The main sewer, 1.5 meters deep and 91 cm across, connected to many north-south and east-west sewers.