From a book called "Traffic Operations plan for the Walled city of Ahmedabad" 1969...

Ahmedabad found in 1411 AD, by Ahmed shah, the then Sultan of Gujarat, had been the citadel of the provincial administration since then. The walled city of Ahmedabad was located in open plains to the east of the river Sabarmati on a smaller area known as Bhadra. This was located with the access to water and road connections.
The city was planned according to the ancient Inda-Aryan tradition of royal capital, typically medieval in character in respect of wall within wall concept. The medieval character is also reflected in the road pattern. All major roads leads from the city gates to the citadel which is enclosed the royal palace. Later, subsidiary roads connecting different locales branched off from major roads.
Around the royal palace, residential quarters, segregated by castes, functions and religion grew in a number of localities known as ‘pole’. New localities grew around the walled city, to house the increasing population. The business activities that developed along the major roads made the walled city into a central business district.
On May 1960, separate state of Gujarat came into existence and Ahmedabad was chosen as the capital of the state. The additional administrative function had greatly enhanced the importance of the city. Gandhinagar started functioning as the capital, with no respite to the city, from its traffic or congestion.
There is a considerable variation in densities on either side of the river. The highest density of 338 persons/acre was within the walled city, while for areas outside the walled city, the density was 31.9 persons/acre. The walled city occupies only 6 percent of the total area contains nearly 40 percent of the total population (11,49,852) of the city.
The imbalance in density has created imbalance in traffic generation which is responsible for under utilisation of traffic facilities. The heavy concentration of population in the walled city has resulted in heavy traffic congestion and also heavy pedestrian traffic which is one of the biggest obstructions to vehicular movements.
Consequent to enormous growth in population, the municipal area of Ahmedabad was extended from time to time.