Heavy-Goods Vehicle Collisions with Steel Road Safety Barriers: Combined Influences of Position of Center of Mass and Tire-Pavement Friction

1999 ◽  
Vol 1690 (1) ◽  
pp. 84-94 ◽  
Author(s):  
Alfonso Montella ◽  
Mariano Pernetti
Keyword(s):  
Road Safety ◽  
Center Of Mass ◽  
Vehicle Collisions ◽  
Safety Barriers ◽  
Pavement Friction

scholarly journals Driver Liability Assessment in Vehicle Collisions in Spain

2021 ◽  
Vol 18 (4) ◽  
pp. 1475
Author(s):  
Almudena Sanjurjo-de-No ◽  
Blanca Arenas-Ramírez ◽  
José Mira ◽  
Francisco Aparicio-Izquierdo
Keyword(s):  
Road Safety ◽  
Accurate Estimation ◽  
Main Hypothesis ◽  
Self Organizing Maps ◽  
Safety Measures ◽  
Vehicle Collisions ◽  
Promising Tool ◽  
Visual Clustering ◽  
Open Question ◽  
The Impact

An accurate estimation of exposure is essential for road collision rate estimation, which is key when evaluating the impact of road safety measures. The quasi-induced exposure method was developed to estimate relative exposure for different driver groups based on its main hypothesis: the not-at-fault drivers involved in two-vehicle collisions are taken as a random sample of driver populations. Liability assignment is thus crucial in this method to identify not-at-fault drivers, but often no liability labels are given in collision records, so unsupervised analysis tools are required. To date, most researchers consider only driver and speed offences in liability assignment, but an open question is if more information could be added. To this end, in this paper, the visual clustering technique of self-organizing maps (SOM) has been applied to better understand the multivariate structure in the data, to find out the most important variables for driver liability, analyzing their influence, and to identify relevant liability patterns. The results show that alcohol/drug use could be influential on liability and further analysis is required for disability and sudden illness. More information has been used, given that a larger proportion of the data was considered. SOM thus appears as a promising tool for liability assessment.

scholarly journals Roadkill records of reptiles and birds in Cerrado and Pantanal landscapes

Check List ◽  
2018 ◽  
Vol 14 (5) ◽  
pp. 845-876 ◽  
Author(s):  
Wagner Fischer ◽  
Raquel Faria de Godoi ◽  
Antonio Conceição Paranhos Filho
Keyword(s):  
Species Distribution ◽  
Road Safety ◽  
New Records ◽  
Bird Species ◽  
Vehicle Collisions ◽  
Reptile Species

We monitored reptile and bird roadkills in Cerrado–Pantanal landscapes along the Campo Grande to Corumbá highway BR-262. We describe species distribution in different landscape zones, including the first geographic record for Hydrodynastes bicinctus Herrmann, 1804 in the Pantanal basin. The roadkill occurrence of Spizaetus melanoleucus (Vieillot, 1816) is an outstanding record. We recorded 930 individuals belonging to 29 reptile and 47 bird species; 20 of these species are new roadkill records in Brazil. The 8 new records of reptile species include Eunectes notaeus Cope, 1862, Bothrops mattogrossensis Amaral,1925, Dracaena paraguayensis Amaral,1950 and H. bicinctus; and 12 new records of bird species include S. melanoleucus, Heterospizias meridionalis Latham, 1790, Urubitinga urubitinga (Gmelin, 1788), Pulsatrix perspicillata (Latham, 1790), Aramus guarauna (Linnaeus, 1766), and Jabiru mycteria (Lichtenstein, 1819). Richness of road-killed species on the BR-262 highway seemed to be high, reinforcing concerns about wildlife-vehicle collisions where these accidents occur, as they lead to long term and chronic impacts on wildlife and road safety in the Pantanal region. 

scholarly journals Daylight saving time can decrease the frequency of wildlife–vehicle collisions

2016 ◽  
Vol 12 (11) ◽  
pp. 20160632 ◽  
Author(s):  
William A. Ellis ◽  
Sean I. FitzGibbon ◽  
Benjamin J. Barth ◽  
Amanda C. Niehaus ◽  
Gwendolyn K. David ◽  
...  
Keyword(s):  
Simple Model ◽  
Road Safety ◽  
Wildlife Conservation ◽  
Traffic Patterns ◽  
Phascolarctos Cinereus ◽  
Vehicle Collisions ◽  
Daylight Saving Time ◽  
Daylight Saving ◽  
Southeast Queensland

Daylight saving time (DST) could reduce collisions with wildlife by changing the timing of commuter traffic relative to the behaviour of nocturnal animals. To test this idea, we tracked wild koalas ( Phascolarctos cinereus ) in southeast Queensland, where koalas have declined by 80% in the last 20 years, and compared their movements with traffic patterns along roads where they are often killed. Using a simple model, we found that DST could decrease collisions with koalas by 8% on weekdays and 11% at weekends, simply by shifting the timing of traffic relative to darkness. Wildlife conservation and road safety should become part of the debate on DST.

scholarly journals On the validation of the LS-DYNA Geo Metro numerical model

2019 ◽  
Vol 262 ◽  
pp. 10001 ◽  
Author(s):  
Dawid Bruski ◽  
Stanisław Burzyński ◽  
Jacek Chróścielewski ◽  
Łukasz Pachocki ◽  
Wojciech Witkowski
Keyword(s):  
Finite Element ◽  
Numerical Model ◽  
Road Safety ◽  
Finite Element Code ◽  
Numerical Tests ◽  
Safety Barriers ◽  
The Subject ◽  
Crash Tests

The paper presents experiences gained during work with numerical model of Geo Metro vehicle used for simulations of crash tests with road safety barriers. Attention is drawn to the subject of tire/wheel breakage during collision events. Some methods for improvement of the model are presented in the paper. Several results for the normative vehicle numerical tests are introduced. Simulations were carried out using LS-DYNA finite element code with solver version R8.1.

scholarly journals The influence of position of the post or its absence on the performance of the cable barrier system

2018 ◽  
Vol 219 ◽  
pp. 02012
Author(s):  
Dawid Bruski ◽  
Stanisław Burzyński ◽  
Jacek Chróścielewski ◽  
Łukasz Pachocki ◽  
Krzysztof Wilde ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Road Safety ◽  
Numerical Study ◽  
Full Scale ◽  
The Road ◽  
Safety Barriers ◽  
Study Results ◽  
Crash Tests

Road safety barriers are used to increase safety in potentially dangerous places on the roads. They are designed and installed on the roads to prevent any vehicle from getting outside the travelled way or from entering the opposite lane of the road. Barriers, which are used on European roads, have to undergo full scale crash tests according to the EN 1317 standards. Nowadays as a supplement to real crash tests, numerical simulations are commonly used. The work concerns the influence of position of the post or its absence on the crashworthiness of the cable barrier based on numerical study results.

scholarly journals Modelling and Simulation of Crash Tests on Curved Barriers Taking into Account Vehicle Speed Limits

2019 ◽  
Vol 14 (3) ◽  
pp. 304-325
Author(s):  
Marian Klasztorny ◽  
Daniel Bronislaw Nycz ◽  
Kamil Pawel Zajac
Keyword(s):  
Numerical Modelling ◽  
Traffic Safety ◽  
Road Safety ◽  
Road Traffic ◽  
Modelling And Simulation ◽  
Small Radius ◽  
Vehicle Speed ◽  
Road Traffic Safety ◽  
Safety Barriers ◽  
Crash Tests

The reliable speed of a vehicle, assigned to a given road arc, is not usually taken into account in simulation of crash tests on road safety barriers located on horizontal concave arcs with small radii (20−200 m). In this work, the numerical modelling and simulations of TB11, TB32 crash tests for selected road safety barriers on a horizontal concave arc with a small radius of 150 m, at a reliable and increased speed of a vehicle, were conducted. The authors developed the methodology of numerical modelling and simulation and published in the period 2015−2018. In this study, crash tests include two N2 class steel road barriers with the B-type guide rail, i.e. SP-05/1 (with 1.00 m post spacing) and SP-05/2 (with 2.00 m post spacing). Suzuki Swift and Dodge Neon vehicle models were taken from the National Crash Analysis Center (USA) library and modified, respectively. It was proved that road traffic safety on horizontal concave arcs with small radii is assured if the reliable velocity is not exceeded by drivers. Compacting the post spacing or the uses of a composite-foam protective overlay added to guide rails are not recommended.

Numerical Analysis of TB32 Crash Tests for 4-cable Guardrail Barrier System Installed on the Horizontal Convex Curves of Road

2020 ◽  
Vol 21 (1) ◽  
pp. 65-81 ◽  
Author(s):  
Krzysztof Wilde ◽  
Dawid Bruski ◽  
Marcin Budzyński ◽  
Stanisław Burzyński ◽  
Jacek Chróścielewski ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Numerical Simulations ◽  
Road Safety ◽  
Road Accidents ◽  
Road Infrastructure ◽  
The Road ◽  
Horizontal Curves ◽  
Convex Curves ◽  
Safety Barriers ◽  
Crash Tests

AbstractHorizontal curves are one of the elements of road infrastructure where statistically a relatively high number of accidents have been reported. In the last 10 years in Poland, approximately 10% of all road accidents happened on horizontal curves of roads and was responsible for approximately 14% of all fatalities on Polish roads. Thus, this issue is important and requires extensive research and proper road safety treatments. One possible measure that may contribute to improvement of safety on road curves may be barriers. The purpose of this work is to assess, with use of numerical simulations, the performance of the 4-cable barrier systems installed on horizontal road convex curves. The most important parameters for road safety barriers are presented including the effect of various impact velocities and the radiuses of the road curves.

Mapping Road Safety Barriers Across Street View Image Sequences

2021 ◽  
Author(s):  
Md Mostafijur Rahman ◽  
Arpan Man Sainju ◽  
Da Yan ◽  
Zhe Jiang
Keyword(s):  
Road Safety ◽  
Image Sequences ◽  
Street View ◽  
Safety Barriers
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