Investigating the influence on safety of retrofitting Italian motorways with barriers meeting a new EU standard

Cafiso, Salvatore; D’Agostino, Carmelo; Persaud, Bhagwant

doi:10.1080/15389588.2016.1203424

Cited by 25 publications

(11 citation statements)

References 12 publications

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“…More specifically, after the calibration of the camera system, it is possible to locate and measure the main dimensions (length, width) of any object along the roadway. Figure 4 presents an example of carriageway measurement and the collection of additional information about pavement and barriers [2].…”

Section: Rearleft Forward Right Rowmentioning

confidence: 99%

A new perspective in the road asset management with the use of advanced monitoring system & BIM

et al. 2018

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The present paper reports different applications which have a common data source: Automatic Road Analyzer (ARAN) of the Transport Infrastructure Laboratory of the University of Catania. Data surveyed with ARAN were used to develop performance indicators of the road asset. A BIM model makes possible to improve the flexibility in information access and to merge data with the aim to allow a complete Road Asset Management (RAM) application in the same environment Data Collected and stored with high efficiency equipment allows to get high quality and detailed information of the road asset and offers the chance to create georeferenced database which can be used both for safety assessment and for the other RAM related applications. BIM provides a comprehensive approach involving the generation and management of transport infrastructure assets using 3D digital representations of their physical and functional characteristics allowing to produce ad hoc output for investigate in the same environment different parts of the RAM.

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Section: Rearleft Forward Right Rowmentioning

confidence: 99%

A new perspective in the road asset management with the use of advanced monitoring system & BIM

et al. 2018

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“…Particularly the areas under investigation are all located in Poland in the territory of the Municipality of Piaski, Zyrardow and Krasnik (Figure 1). When surveys were performed there was not physical separation in the median [19]. For each test site the location of cameras was chosen to ensures an excellent view of the merging area and of vehicle paths.…”

Section: Observed Conflictsmentioning

confidence: 99%

Traffic conflicts analyses for 2+1 road sections

et al. 2018

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The additional passing lanes and 2+1 roads improve significant road safety. Studies indicate sections with additional passing lanes (relief or alternately), which may cause reduction in the number of accidents by 50%. However, how geometric design affects the safety performance of such sections is not in depth investigated. Previous studies are carried out with two approaches, i.e. the most often, based on analysis of observed crashes and more rarely by using microsimulation study. In the case of microsimulation research, traffic conflict theory can be applied as a surrogate measure of safety. One of the main problem in simulated conflicts study is the validation of simulation results against real world conditions. The aim of the paper is to assess the reliability of traffic conflict measures obtained by microsimulation against real world observation. Conflicts were detected and classified from video recording and analysis of vehicle trajectories in the merging area on 2+1 roads in Poland. Conducted studies focus only on lane changing conflicts, locations and TTCs values of observed conflicts between vehicles were primarily identified. Observed conflicts are than compared with microsimulated one, to assess if there is a correlation in the two.

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“…The before-after analysis was another popular method among researchers for evaluating traffic barriers. Cafiso et al [20] investigated a crash modification factor (CMF) about 0.78 (22% reduction in crashes) for upgrading the old traffic barriers. The improvement effect was estimated even more considerably for the ROR crashes showing a CMF equal to 0.67.…”

Section: Introductionmentioning

confidence: 99%

Modeling traffic barriers crash severity by considering the effect of traffic barrier dimensions

2019

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Traffic barriers are in widespread all around the USA as safety countermeasures for reducing the severity of runoff road crashes. The effect of traffic barriers' dimension had been ignored in past real-world crash studies due to the considerable cost and time needed for collecting field data. This paper presented two new analytical models to investigate the effect of different variables on the severity of crashes involving traffic barriers, and end treatments. For this reason, a field survey was conducted on over 1.3 million linear feet of traffic barriers (approximately 4,176 miles road) in Wyoming to measure traffic barriers' geometric features like height, length, offset, and slope rate. The collected data included 55% of all non-interstate roads of Wyoming. Based on results, the crashes involving box beam barriers were less severe than the crashes involved with W-beam or concrete barriers. The traffic barriers with a height between 28 and 31 in. were found safer than the traffic barriers shorter than 28 in., while there was no significant difference between the traffic barriers taller than 31 in. to those shorter than 28 in. in terms of crash severity. The end treatments located nearer to the traffic lane had lower crash severity. Keywords Crash severity Á Runoff road crashes Á Traffic barriers Á End treatments Á Traffic barrier dimensions Á Real-world crash analysis Á Wyoming

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Investigating the influence on safety of retrofitting Italian motorways with barriers meeting a new EU standard

Abstract: The magnitude of this benefit indicates that the retrofits are cost-effective even for total crashes and should continue in any European country inasmuch as the estimated Crash Modification Factors are based on treatment sites that are reasonably representative of all European motorways.

Cited by 25 publications

References 12 publications

A new perspective in the road asset management with the use of advanced monitoring system & BIM

A new perspective in the road asset management with the use of advanced monitoring system & BIM

Traffic conflicts analyses for 2+1 road sections

Modeling traffic barriers crash severity by considering the effect of traffic barrier dimensions

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