The remains of Harappa and Mohenjo-daro reveal a remarkable sense o town planning. The town were laid out in a rectangular grid pattern. The roads ran in north-south and east-west direction and cut each other at right angles.
A flourishing civilisation emerged on the banks of the river Indus in the second half of the third millennium BCE and spread across large parts of western India. This is what we know as Harappan civilisation or Indus Valley civilisation.