Potential safety occurrences as indicators of air traffic management safety performance: A network based simulation model

Netjasov, Fedja; Crnogorac, Dušan; Pavlović, Goran

doi:10.1016/j.trc.2019.03.026

Cited by 29 publications

(20 citation statements)

References 17 publications

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“…A loss of separation exists between two aircrafts if one of them enters the other's forbidden volume. Losses of separation could be of a crossing or an overtaking type, depending on the aircraft trajectory relations both in horizontal and vertical planes [46]. [4]).…”

Section: Conflict Riskmentioning

confidence: 99%

“…The assessment of safety indicators was done using Conflict Risk Assessment Tool [46]. This tool is intended for the simulation of planned or analysis of realised air traffic, consisting of flight trajectories (4D trajectories) crossing a given airspace, with the aim of assessing safety performance.…”

Section: Assessment Of Safety Indicatorsmentioning

confidence: 99%

“…This tool is intended for the simulation of planned or analysis of realised air traffic, consisting of flight trajectories (4D trajectories) crossing a given airspace, with the aim of assessing safety performance. Conflict Risk Assessment Tool has been developed as a network based simulation model consisting of three modules, each being used for the calculation of certain safety indicators [46] The separation violation detection module simulates flights (following discrete simulation logic with constant time steps) and compares the actual separation of aircraft following certain predefined flight trajectories (both in horizontal and vertical planes) with a given separation minima in order to detect PLoS [46]. Once PLoS are detected, this module counts them and for each of them calculates its severity and duration under given circumstances.…”

Section: Assessment Of Safety Indicatorsmentioning

confidence: 99%

“…If the situation worsens, then TCAS activation module will uncover which event could occur. It counts TAs and RAs and based on vertical separation between aircraft at closest point of approach (CPA) counts possible number of NMACs [46].…”

Section: Assessment Of Safety Indicatorsmentioning

confidence: 99%

“…Summing up elementary risks for all possible conflicting pairs of aircraft and dividing it with the observed period of time (e.g. 24 hours), a conflict risk in a given airspace can be estimated [46].…”

Section: Assessment Of Safety Indicatorsmentioning

confidence: 99%

See 4 more Smart Citations

Relationship between Air Traffic Demand, Safety and Complexity in High-Density Airspace in Europe

Pejovic¹,

Netjasov²,

Crnogorac³

2020

Risk Assessment in Air Traffic Management

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Air traffic performance of the European air traffic system depends not only on traffic demand but also on airspace structure and its traffic distribution. These structural (airspace structure) and flow characteristics (factors such as traffic volume, climbing/descending traffic, mix of aircraft type, military area activity) influence airspace complexity, which can affect controller workload and influence the probability of safety occurrence. In other words, all these dynamic and static complexity components can potentially have an impact upon the safety of the air traffic management (ATM) system. Having in mind fluctuation in traffic on daily, seasonal or annual level in certain airspace, a few questions arise: How changes in traffic demand influence complexity and conflict risk? Is there any correlation between traffic demand, conflict risk and complexity? and Are there any differences between seasons? For that purpose, an investigation is performed on FAB Europe Central (FABEC) airspace, based on 2 weeks of operated traffic during the summer and fall of 2017. Air traffic complexity is estimated using the EUROCONTROL complexity metrics, while conflict risk is assessed using the conflict risk assessment simulation tool. Results show that certain positive relationship exists between traffic demand, conflict risk and complexity.

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Section: Conflict Riskmentioning

confidence: 99%

Section: Assessment Of Safety Indicatorsmentioning

confidence: 99%