Monitoring of traffic noise on urban road intersection - Case Study

Modeling the Influence of Roundabout Deflection on Its Efficiency as a Noise Abatement Measure

“…These models were applied in the noise calculations at three suburban roundabouts with different geometric design features and dimensions, under unsaturated traffic conditions. Research results validated the proposed models and showed that they over-predict noise levels by 1.9 dB(A) and 1.2 dB(A), which is in line with the results of similar studies [62,63,67]. It was concluded that the VAR-2 model is more suitable for the application in road traffic noise calculations on roundabouts because the calculation results were closer to the measured values, and because it required a shorter preparation time compared to the VAR-1 model.…”

“…This value ranges from 0 to 3 dB(A), depending on the proximity of the intersection to the receiver [65]. Previous research conducted on the University of Zagreb Faculty of Civil Engineering showed that the following modifications of the standard RLS-90 model (hereinafter referred to as VAR-1) improve the accuracy of calculated sound pressure levels for urban streets and intersections [62,63]:…”

“…Based on that, a static noise model RLS-90 was selected as a baseline for road traffic noise calculations conducted in the research presented in this paper. Previous research showed that modifications of the standard RLS-90 model (described in Section 2) can result in the reduction of differences between measured and calculated noise levels ranging from 1.0 to 2.8 dB(A) for streets and intersections [62,63]. However, the modifications concerning the position of noise sources showed to be too detailed and time-consuming when modeling traffic noise at roundabouts, especially roundabouts with more than one entry and exit lane.…”

Assessment of Road Noise Pollution in Urban Residential Areas—A Case Study in Piteşti, Romania

“…One direction to study the possibility of reducing road noise in residential areas is to regulate road traffic at intersections. Thus, the comparative analysis between traffic light intersections and roundabouts, under the same road traffic flows, reveals a reduction of noise pollution by 1-2 dB in the case of traffic regulation in the roundabout [16]. However, these results are obtained by simulation: with specialized noise prediction software LimA using modified static noise calculation method RLS 90 [16] or using NMPB-Routes 96 [17] and in the conditions of a homogeneous road traffic.…”

“…Thus, the comparative analysis between traffic light intersections and roundabouts, under the same road traffic flows, reveals a reduction of noise pollution by 1-2 dB in the case of traffic regulation in the roundabout [16]. However, these results are obtained by simulation: with specialized noise prediction software LimA using modified static noise calculation method RLS 90 [16] or using NMPB-Routes 96 [17] and in the conditions of a homogeneous road traffic. In this paper the research will be based on the measurement of road noise in various intersections, in which road traffic is either homogeneous or composite (light and heavy vehicles).…”