Estimation of uncertainty and variability of urban traffic volume measurements in Kielce

Bąkowski, Andrzej; Dekýš, Vladimír; Radziszewski, Leszek; Skrobacki, Z.; Świetlik, Paweł

doi:10.1109/autosafe.2018.8373314

Cited by 10 publications

(10 citation statements)

References 5 publications

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“…Drawings of histograms and Q-Q quantile plots show that the probability distributions of the tested data deviate from the normal distribution. The conducted statistical tests of Shapiro-Wilk and the Jarque-Bera confirm this hypothesis [22].…”

Section: Measurements and Calculations Resultssupporting

confidence: 52%

“…This paper analyses the results of traffic flow and noise measurements recorded by stationary monitoring station [21][22][23][24]. This station was located close to the city limits, at Popiełuszki Av.…”

Section: Recorded Data Analysis Proceduresmentioning

confidence: 99%

“…In order to compare the results obtained in different years, the authors proposed the use of the normalized traffic flow [22,[26][27][28][29] determined from:…”

Section: Recorded Data Analysis Proceduresmentioning

confidence: 99%

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Measurements of urban traffic parameters before and after road reconstruction

Bąkowski

Radziszewski

2021

Open Engineering

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The study analyzed the parameters of vehicle traffic and noise on the national road in the section in the city from 2011 to 2016. In 2013–2014 this road was reconstructed. It was found that in most cases, the distribution of the tested variable was not normal. The median and selected percentiles of vehicle traffic parameters and noise were examined. The variability and type A uncertainty of the results were described and evaluated. The results obtained for the data recorded on working and non-working days were compared. The vehicle cumulative speed distributions, for two-way four-lane road segments in both directions were analyzed. A mathematical model of normalized traffic flow has been proposed. Fit factor R2 of the proposed equations to the experimental data for passenger vehicles ranges from 0.93 to 0.99. It has been shown that two years after the road reconstruction, the median noise level did not increase even though traffic volumes and vehicle speeds increased. The Cnossos noise model was validated for data recorded over a period of 6 years. A very good agreement of the medians determined according to the Cnossos-EU model and the measured ones was obtained. It should be noted, however, that for the other analyzed percentiles, e.g. 95%, the discrepancies are larger.

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Section: Measurements and Calculations Resultssupporting

confidence: 52%

Section: Recorded Data Analysis Proceduresmentioning

confidence: 99%

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Measurements of urban traffic parameters before and after road reconstruction

Bąkowski

Radziszewski

2021

Open Engineering

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“…Passenger cars constitute 76% of the total number of vehicles on a working day. The number of lorries expressed as a percentage is 4% [2]. On Sundays, however, the share of lorries drops to 2% and that of passenger cars increases to 87%.…”

Section: Sound and Traffic Volume Measurementsmentioning

confidence: 95%

“…Owing to some technical problems, the data set was incomplete and comprised 8,375 counts. The box plots of traffic volume a) day-to-day average traffic volume, b) plots of a 24h period for Wednesdays [2] The plots show that from Monday to Thursday the volumes change slightly, increase on Friday by about 2% and decrease on Sunday by about 37%. The nature of these changes is consistent with the literature of the subject.…”

Section: Sound and Traffic Volume Measurementsmentioning

confidence: 99%

Assessment of variability of acoustic power generated by traffic volume

et al. 2019

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The concept of energy harvesting is a mechanism of deriving energy from the sources present in the environment. Using this energy will enable wireless and portable electronic devices to be completely self-sustaining. A variety of sources are available for energy harvesting, including electromagnetic radiation, vibration-, sound -, and windenergy. The output power levels from these sources and the mechanisms involved in energy conversion determine its possible applications. The paper analyses the variability of the acoustic power generated by traffic volume. The equivalent sound level was calculated by permanent automatic sound and traffic volume monitoring stations for three time intervals. The measurements were carried out 24 hours a day. In this study, the authors analysed the acoustic power to be able to compare the fixed and variable components. Standard deviation, coefficient of variation, the positional coefficient of variation, and the quartile deviation were proposed for performing a comparative analysis of the acoustic power scattering. The coefficient of variation is a parameter that satisfactorily describes a variable component of acoustic power. Uncertainties of the acoustic power calculation were compared within the periods under analysis.

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