Why do we say Harappan cities were well planned?

               The cities of Harappa were well planned, and even had covered drains. Large areas were built with bricks of the same size and weight. They used kilns to make bricks, and used burnt bricks in domestic and public buildings.

               The city streets were straight and broad. They were paved and laid at right angles to each other. The houses were protected against noise, odours, and thieves. Houses faced streets, and were at least two storeys high. They had brick staircases leading to the upper levels and the roof. Life was centred on an enclosed courtyard, and there was a balcony over the courtyard. Each house had its own well, and one even had a large bathtub!