In this paper, we propose a construction process that enables the transformation of an urban traffic network using a cellular automata lattice. An abstract network hierarchy is defined which allows us to describe the important properties of an urban traffic network layer by layer. The cellular automata lattice is extended with three additional types of cells that permit the modelling of conflic...

This is the first deliverable under work package WP1 of the HYBRIDGE project. The aim of the report is to provide a list of safety critical operational situations in air traffic management. A “gate to gate” view is presented of the safety critical situations an aircraft may encounter in normal flight conditions. Particular attention is devoted to cases likely to become more prominent as air tra...

Eurocontrol has introduced a Tactical Controller Tool (TCT), for use by Tactical Air Traffic Controllers (ATCs) who require trajectory conflict information over the next 5 to 8 minutes to help them detect conflicts in their sector. Simulation trials indicate that the safety benefits of TCT may be limited because of large numbers of False Alarms. There is a need to tune the system to identify th...

• Conducted a systematic mapping review on surrogate safety assessment research. Provided comprehensive framework covering various aspects of traffic conflicts. Identified the critical research needs within field assessment. Fundamental is needed to develop crash-conflict relationships. Injury severity estimation using surrogates represents need. Safety road sections and networks have historica...

UNLABELLED In this paper, we propose a relational complexity (RC) network framework based on RC metric and network theory to model controllers' workload in conflict detection and resolution. We suggest that, at the sector level, air traffic showing a centralised network pattern can provide cognitive benefits in visual search and resolution decision which will in turn result in lower workload. W...

In this paper, we demonstrate a high-level approach to modeling and analyzing complex safety-critical systems through a case study in the area of air traffic management. In particular, we focus our attention on the Traffic Alert and Collision Avoidance System (TCAS) [11, 12]; an on-board conflict detection and resolution system which alerts pilots to the presence of nearby aircraft that pose a ...

Automated conflict-avoidance for unmanned aerial systems is quickly becoming feasible due to near-future advances in communication guarantees. The NextGen Implementation Plan introduced by the FAA lays out requirements for air traffic in the US airspace to be implemented by 2020. This includes mandates for the introduction of the automatic dependent surveillance broadcast (ADS-B) on each system...

In network steganography methods based on packet length, the length of the packets is used as a carrier for exchanging secret messages. Existing methods in this area are vulnerable against detections due to abnormal network traffic behaviors. The main goal of this paper is to propose a method which has great resistance to network traffic detections. In the first proposed method, the sender embe...