Context-aware system for pre-triggering irreversible vehicle safety actuators

Bohmlander, Dennis; Dirndorfer, Tobias; Al-Bayatti, Ali H.; Brandmeier, Thomas

doi:10.1016/j.aap.2017.02.015

Cited by 25 publications

(6 citation statements)

References 21 publications

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“…However, crashes resulting from turning maneuvers at urban intersections are particularly likely to involve cars colliding on different chassis parts with various velocities, angles, and overlaps. Therefore, a two-dimensional crash severity model presented by Müller et al ( 20 , 29 ) and Böhmländer et al ( 30 ) is employed to calculate the Δv of cars involved in a collision.…”

Section: Crash Severity Modelsmentioning

confidence: 99%

Simulation of Urban Crash Occurrence Based on Real-World Crash Data

Langer

Kates

Bogenberger

2022

Transportation Research Record: Journal of the Transportation R

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The intelligent application of simulation is of central importance for the successful development and testing of automated driving functions. Realistic virtual environments are required to assess and optimize both the efficiency and safety of automated driving functions in real-world traffic situations. While existing traffic flow simulation frameworks excel at evaluating traffic efficiency, the implementation of human failure models and traffic safety aspects is a current field of research. In this publication, the occurrence of human failures is inferred from real-world crash statistics and introduced into traffic simulation. A realistic traffic simulation setup of the city of Ingolstadt, Germany, is used as a basis for this simulation of crash occurrence. Focusing on intersections as the most important urban crash hot spots, the relation between human failures and the occurrence of collisions is estimated for each conflict point in the simulation network. From crash statistics, the distributions of crash quantities and types across the intersections in the simulation network are calculated. An Iterative Proportional Fitting algorithm is used to project crash counts available at the intersection level onto the “conflict level,” determined by intersecting traffic streams within intersections. Human failures are generated and applied to traffic participants in the simulation using a Monte Carlo selection. The results demonstrate the functionality of the method for calibrating models for realistic crash occurrence in traffic simulation. This methodology provides a basis for simultaneous evaluation of both traffic efficiency and traffic safety impacts of future developments in urban traffic networks.

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Section: Crash Severity Modelsmentioning

confidence: 99%

Simulation of Urban Crash Occurrence Based on Real-World Crash Data

Langer

Kates

Bogenberger

2022

Transportation Research Record: Journal of the Transportation R

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“…A promising approach in this regard is to assign higher priority to warning messages over non-warning messages (A non-warning message refers to any message other than the warning message, which can be used to communicate route identification, traffic density information, etc. [14,15].) (see, e.g., [16]).…”

Section: Motivation and Objectivesmentioning

confidence: 99%

PDMAC: A Priority-Based Enhanced TDMA Protocol for Warning Message Dissemination in VANETs

Abbas

Haider

et al. 2019

Sensors

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Vehicular ad hoc networks (VANETs) are the key enabling technology for intelligent transportation systems. Carrier-sense multiple access with collision avoidance (CSMA/CA) is the de facto media access standard for inter-vehicular communications, but its performance degrades in high-density networks. Time-division multiple access (TDMA)-based protocols fill this gap to a certain extent, but encounter inefficient clock synchronization and lack of prioritized message delivery. Therefore, we propose a priority-based direction-aware media access control (PDMAC) as a novel protocol for intra-cluster and inter-cluster clock synchronization. Furthermore, PDMAC pioneers a three-tier priority assignment technique to enhance warning messages delivery by taking into account the direction component, message type, and severity level on each tier. Analytical and simulation results validate the improved performance of PDMAC in terms of clock synchronization, channel utilization, message loss rate, end-to-end delays, and network throughput, as compared with eminent VANET MAC protocols.

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“…The main contribution consists in the differentiation of broadcasting schemes based on client applications. Authors in [41] describe a context-aware system that identifies potential accidents and pro-actively enables safety mechanisms before the accident occurs. The information acquired from the sensors in the vehicles (i.e., data prior to the accident) is analyzed to predict a certain collision and its severity; in this way, the system launches a timely warning.…”

Section: Context-aware Systemsmentioning

confidence: 99%

A baseline for context-aware system for safety messages dissemination in VANETs

Yáñez

Céspedes

Rubio‐Loyola

2019

Rev.Fac.Ing.Univ.Antioquia

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Vehicular ad-hoc networks (VANETs) are mobile networks with highly dynamic contexts of operation. The design and application of context-aware systems could be critical to enhance the performance of protocols deployed in VANETs, which depend on both network and traffic conditions, to detect hostile communication environments, as well as to offer a novel way to make decisions in real-time. In this paper, we present a baseline study for the design of a context-aware system for dissemination of safety messages in VANETs. We model a realistic vehicular intersection and perform extensive simulations to evaluate two well-known dissemination mechanisms, namely the Slotted 1-persistence and the Traffic Adaptive Data Dissemination (TrAD) Protocol, with a set of parameters according to different operation scenarios. We show how the dissemination mechanisms’ performance could be improved, or worsened, by choosing a different set of parameter values. By characterizing the operation scenarios, it is possible to adequate the parameters of the dissemination mechanism with the values that work best in a given context, improving in this way the general performance of the dissemination mechanisms under study.

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Context-aware system for pre-triggering irreversible vehicle safety actuators

Cited by 25 publications

References 21 publications

Simulation of Urban Crash Occurrence Based on Real-World Crash Data

Simulation of Urban Crash Occurrence Based on Real-World Crash Data

PDMAC: A Priority-Based Enhanced TDMA Protocol for Warning Message Dissemination in VANETs

A baseline for context-aware system for safety messages dissemination in VANETs

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