Effects of Vehicular Speed on the Assessment of Pavement Road Roughness

Loprencipe, Giuseppe; Zoccali, Pablo; Cantisani, Giuseppe

doi:10.3390/app9091783

Cited by 42 publications

(22 citation statements)

References 22 publications

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“…Three acceleration values were considered: 0.315 m/s 2 , an upper band of the “not uncomfortable” reaction level (Table 1); 0.63 m/s 2 , an upper band of the “a little uncomfortable” reaction level; and 0.9 m/s 2 , an average of the upper band of the “fairly uncomfortable” level (1 m/s 2 ) and the lower band of the “uncomfortable” level (0.8 m/s 2 ). These acceleration limit values were in line with other proposals ( 17, 18, 30, 56 ).…”

Section: Iri Thresholds Based On Wbv Measurementsupporting

confidence: 92%

“…They used 120 sections of length, L = 320 m. IRI thresholds were derived for a wSz = 0.315, 0.63, and 0.90 m/s 2 as IRI = a wSz / b 1 . Similar parameters of dependence a wSz = f (IRI) and IRI thresholds were calculated by Loprencipe et al ( 30 ) for 621 real road sections of a total length of 200 km.…”

Section: Iri Thresholds Based On Wbv Measurementsupporting

confidence: 56%

“…Table 5 shows the identified constant b 1 calculated as a function of vehicle speed. This is an approach typical of other authors (17)(18)(19)30). The constant b 1 depends on vehicle speed.…”

Section: Iri Thresholds Based On Wbv Measurementmentioning

confidence: 98%

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International Roughness Index Thresholds Based on Whole-Body Vibration in Passenger Cars

Múčka

2020

Transportation Research Record

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This study analyzed whole-body vibration (WBV) on a car seat (seat surface and feet) in passenger cars as a function of longitudinal road roughness. Measurements were provided on nine different cars in six categories and included a total travel distance of 1,860 km. The root mean square (RMS) of the frequency-weighted acceleration was used to quantify WBV. The relationship between seat acceleration response and comfort reactions according to the ISO 2631-1 and the International Roughness Index (IRI) was estimated. IRI thresholds were proposed as a function of vehicle speed and road category. Proposed IRI thresholds decreased with vehicle velocity and were similar with published IRI threshold proposals based on simulation. IRI thresholds as a function of speed limit should decrease with power by approximately –0.75. Substantially lower (by ~ 40%) IRI thresholds were calculated for the total vibration value (six signals) in comparison with vertical vibration on the seat surface.

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Section: Iri Thresholds Based On Wbv Measurementsupporting

confidence: 92%

Section: Iri Thresholds Based On Wbv Measurementsupporting

confidence: 56%

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International Roughness Index Thresholds Based on Whole-Body Vibration in Passenger Cars

Múčka

2020

Transportation Research Record

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“…where W k,I are the frequency weightings in one-third octave bands for seated position, provided by the standards, and a iz is the vertical RMS acceleration for the i-th one-third octave band. This method ( Figure 3) allowed the evaluation of the vertical accelerations in order to analyze the comfort of car passengers [39,45,46].…”

Section: Methodsmentioning

confidence: 99%

Raised Pedestrian Crossings: Analysis of Their Characteristics on a Road Network and Geometric Sizing Proposal

Loprencipe¹,

Moretti²,

Pantuso³

et al. 2019

Applied Sciences

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In urban areas traffic-calming strategies and pedestrian friendly measures are often adopted to reduce the adverse impacts of motor vehicles on vulnerable users. This study surveyed 24 raised pedestrian crossings (RPCs) to examine their geometrical and functional characteristics. Geometric characteristics, location, administrative and effective vehicle speed, and the whole-body vibration acceleration induced to vehicle occupants while they are passing over, were considered. In addition to the analysis of the field data, geometrical and functional criteria to design RPCs were carried out. Particularly, two design approaches have been considered. In the first one, RPC provides a designated route across a carriageway raised to the same level, or close to the same level, as the sidewalks that provide access to the pedestrian crossing. In such condition, an RPC is not a traffic-calming device and its design should satisfy geometrical and comfort criteria for designing roads. The results from the surveys demonstrated that less than 10% of RPCs guarantee ride comfort. According to the second design approach, an RPC acts both as a marked pedestrian feature and as a traffic-calming device (i.e., it is trapezoidal in shape with sharp edges). The analysis of the vertical accelerations on vehicle occupants reveal that more than 90% of the surveyed RPCs comply with geometrical and dynamic criteria for speed tables. Extreme variations concerning the observed geometrical characteristics of RPCs and the modelled dynamic performances have been observed: It results in noneffective treatments. Therefore, the results of this study would contribute to providing geometric best practices for overcoming the regulation gap in this subject, and designing RPCs according to international standards. pedestrian infrastructures is increasing [15,16]. Over the years, different systems have been adopted to reduce the risk of vehicle-pedestrian collisions, especially in urban areas. Speed control undulations (SCUs) are traffic-calming units that aim to increase pedestrian safety, as well as reduce noise and pollution from traffic in residential areas.Undulations are usually installed on residential, local, or collector roads; at any rate, these urban roads should not have buses, emergency traffic or, in general, heavy traffic, and should have an administrative speed limit of 20 or 30 km/h [5,17]. A warning sign with an adequate speed limit sign should be installed before an undulation [1,18]. When 15% of traffic exceeds the speed limit by 8-16 km/h the enforcement band is not effective [19], and the road manager could evaluate the installation of SCUs and/or other traffic-calming systems.Raised pedestrian crossings (RPCs) are used in urban areas to increase the walkability of neighborhoods [20] and to reduce the probability of pedestrian injuries and fatalities after a crash, either within specific traffic-calming programs, or more generally within Sustainable Urban Mobility Plans, with increased road safety being one of the main priorities in th...

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“…Loprencipe et al evaluated the use of IRI index for the road unevenness in relation to the road users' comfort, confirming the results obtained by Ahlin et al that indicated that sometimes IRI can lead to incorrect and not accurate results because in its calculation the contribution provided by some frequencies is underestimated or even not considered. Thus, it can happen that two pavements profiles having the same IRI value can induced completely different acceleration levels [13].…”

Section: Introductionmentioning

confidence: 99%

An innovative approach for high-performance road pavement monitoring using black box

Meocci

Branzi

Sangiovanni³

2021

J Civil Struct Health Monit

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One of the criteria adopted by the Word Bank with the aim of defining the economic level of a country is represented by the condition of the road pavements. To ensure adequate road pavement quality, road authorities should be continuously monitoring and repair the detected anomalies. To fast solve problems associated with poor quality of road surface such as comfort or safety, the presence of distress must be detected quickly. The high-performance pavement distress detection, such as those base on the image processing or on the laser scanning, is very expensive and does not allow to the road administration to conduct the appropriate monitoring campaigns. To solve these problems, the paper describes the pave box methodology, an innovative and immediately operational distress detection approach based on the exploitation of data collected by the black boxes located inside the vehicles that routinely pass on the road network. Data processing and the algorithms used in the post-processing evaluation of the vertical acceleration were compared with existing visual surveys procedures such as PCI. Two different indices have been proposed to detect and classify both the local damages and the global condition of the entire road. Pave box provides a robust evaluation of the pavement condition that allows to detect all the severe distress and not less than 70% of the minor damages on the pavement surface. The proposal is characterized by low time and cost consumption and it represents an effective tool for road authorities.

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Effects of Vehicular Speed on the Assessment of Pavement Road Roughness

Cited by 42 publications

References 22 publications

International Roughness Index Thresholds Based on Whole-Body Vibration in Passenger Cars

International Roughness Index Thresholds Based on Whole-Body Vibration in Passenger Cars

Raised Pedestrian Crossings: Analysis of Their Characteristics on a Road Network and Geometric Sizing Proposal

An innovative approach for high-performance road pavement monitoring using black box

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