A graduate from the UK's Barlett School of Architecture has proposed constructing airport runways above the streets and waterways in a new city district in Stockholm, Sweden.
Entitled 'Stockholm City Airport/Airport City,' the proposal calls for integration of commercial aviation into the city instead of restricting it to outskirts, Dezeen reported.
The concept was a part of the school's Unit 16, where students were asked to develop a utopian dream and come up with the required steps to turn it into reality.
Alex Sutton proposed building a new airport within the city where small terminals, bagging systems and runways would be constructed around commercial buildings.
Sutton said: "Travel demand in the aviation industry is set to double by 2030 and continue increasing exponentially into the future.
"In order to satisfy demand and the increasing importance of the airport on local economies, capacity in the industry needs to increase.
"This project uses Stockholm, one of the fastest growing cities in Europe, as a testing ground to establish a fully integrated urban airport as part of a new city district, in a time when aviation technology is such that aircraft and airports could operate from within our cities."
The proposal is likely to help in reducing emissions by introducing an elevated taxi-track system to move aeroplanes around the terminals to disengage engines until take-off.
Sutton also proposed use of a personal rapid transit (PRT) system, a series of pods that move along rail tracks, to transport passengers to their destinations.
The PRT stations will be surrounded by self-service baggage kiosks to remove the stress of carrying luggage around.
The Stockholm Arlanda Airport is the largest airport in Sweden, and is located around 37km north of the city.