| Summary: | While recent emergence of multirotor UAS as a transport option in urban area promises
to unlock the vertical dimension and greatly increase the transportation capacity, managing
the safety and efficiency of UAS operations in the complex and densely populated very-low
altitude urban airspace could be challenging. In particular, the safety case must be made, and
accepted, by the urban population for the UTM to be viable. The Aviation Transformation
Programme Project 5 (ATP5) under Singapore’s National Research Fund was setup to identify
and tackle the challenges for the enabling of UAS operations in highly urbanized airspace and
the eventual establishment of urban UTM. The project focuses on the risk assessment for UTM
in two directions: the risk of UAS operation to ground population and the risk of UAS operation
to other UTM users. This paper describes the approach taken by the Air Traffic Management
Research Institute in Singapore to enable the progressive opening up of urban airspace for UAS
operations for various level of traffic pattern complexity and demands.
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