Theory:

Town Planning:
The Indus Valley Civilization had an unconventional approach to city planning. It demonstrated that they led a very civilised life. The Indus people built the first planned cities with drainage systems.
 
The Indus cities were designed according to a set of guidelines. In nature, town planning was perfectly planned. Few towns had citadels to the west, which were constructed on a higher platform and to the east of which the residential area was located. Both of them are surrounded by a massive brick wall.
The cities that do not have a citadel are built on high mounds.
Storyboard on life of Harappan people:
picture.JPG
Streets:
streets of indus.jpg
 
Harappa'sstreets ran parallel to each other and intersected at right angles. Streets and paths, which were \(13 \)to \(34 \)feet wide and well-lined, divided the city into rectangular blocks. Archaeologists found lamp posts at regular intervals, indicating the presence of street lights and dustbins on the streets. This demonstrates the existence of a competent local government.
Drainage System:
The Indus valley civilisation city had a unique closed drainage system, which was one of its most notable features.
drainage.jpg
 
Each home had its drainage system and soak pit that was connected to the public system. Every street was lined with brick-paved channels. They were sealed and had repair holes for washing and clearing at regular intervals. As a result, the Indus people had a flawless underground drainage system. No other modern society has paid such close attention to cleanliness.
Buildings:
The people of the Indus Valley civilisation constructed terraced houses made of burnt bricks in the proper street and other structures along the roadside. There were at least two rooms in every home, and some had more than one storey. The houses were constructed around an inner courtyard and included pillared halls, paved floors, toilets, a well, and a kitchen, among other amenities. One of these structures has the largest hall, approximately \(80\) feet long and \(80 \)feet wide. It may be a castle, a mosque, or a meeting hall, with a few workmen's quarters thrown in for good measure. There was an excellent water supply system in place, including public wells on the side of the road. There was a well in every big building.
They also built a dockyard at Lothal.
Reference:
https://sbt.blob.core.windows.net/storyboards/hologram/indus-valley-civilization.png?utc=131850063283630000https://www.harappa.com/sites/default/files/styles/galleryformatter_slide/public/p-57.jpg?itok=8a5E1_ik
<iframe width="560" height="315" src="https://www.youtube.com/embed/gpLbRr5Efcg" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen=""></iframe>
https://sbt.blob.core.windows.net/storyboards/hologram/indus-valley-civilization.png?utc=131850063283630000