the paper discusses the current state of research concerning railway network timetabling and traffic management. timetable effectiveness is governed by frequency, regularity, accurate running, recovery and layover times, as well as minimal headway, buffer times and waiting times. analytic (queuing) models and stochastic microsimulation are predominantly used for estimation of waiting times and ...

every year, a part of the national capital of the country is lost due to the disorders of traffic. an important part of the traffic disorders is caused by the improper behavior of some users of urban transport system. such a situation is contrary to the principles of smart growth and urban sustainability. the study of traffic conflicts as a symbol of the society culture of traffic can lead city...

Conflict resolution has always been a sensitive matter in air-traffic management. Current European projects aim partial or total automation of air traffic control to deal with the constant growth of air traffic. Technological advances on flight management system allows us to consider an automatic conflict resolution using continuous trajectories. In this paper, we present a new methodology that...

This paper reports the results of a study that explored the relationship between fatal crashes and conflict rates at mid-block on 14 locations in Delhi, India. All locations had a mix of motorized and non-motorized traffic. The sites were selected to represent low, medium and high fatality rates. The analysis was done in two stages. The first stage used recent 3-year statistics along the entire...

In this paper an imaging system for road traffic conflict analysis is proposed. The system exploits geo-referenced stereo sequences and tracking procedure to compute traffic conflict measures which can be analysed by experts. Using the potentiality of the traffic conflict technique as a surrogate safety measure could constitute an effective tool in understanding how the driver interacts and ada...

In this paper, we aim to examine the relationship between traffic flow and potential conflict risks by using crash surrogate metrics. It has been widely recognized that one traffic flow corresponds to two distinct traffic states with different speeds and densities. In view of this, instead of simply aggregating traffic conditions with the same traffic volume, we represent potential conflict ris...

This study compared pilot situation awareness across three traffic management concepts that varied traffic separation responsibility between the pilots, air-traffic controllers, and an automation system. In Concept 1, the flight deck was equipped with conflict resolution tools that enable them to perform the tasks of weather avoidance and self-separation from surrounding traffic. In Concept 2, ...

Automated separation assurance systems are being developed to reduce controller workload and increase airspace capacity of the National Airspace System (NAS). To evaluate these systems, a measure for conflict risk is required. The objective of this analysis is to estimate the rate at which flights enter a course of potential conflict or collision under different traffic loads. Conflict rates ar...

In this paper, an automated conflict resolution algorithm is evaluated based on fast-time simulations of nominal and heavily increased air traffic demand in the Cleveland Air Route Traffic Control Center airspace. The algorithm under study is designed to support an automated separation assurance capability for next-generation air traffic management systems. It resolves detected conflicts that a...

This study compared pilot situation awareness across three traffic management concepts. The Concepts varied in terms of the allocation of traffic avoidance responsibility between the pilot on the flight deck, the air traffic controllers, and a conflict resolution automation system. In Concept 1, the flight deck was equipped with conflict resolution tools that enable them to fully handle the res...