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Traffic Circle—An Example of Sustainable Home Zone Design

Author

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  • Stanisław Majer

    (Department of Construction and Road Engineering, West Pomeranian University of Technology in Szczecin, 71-311 Szczecin, Poland)

  • Alicja Sołowczuk

    (Department of Construction and Road Engineering, West Pomeranian University of Technology in Szczecin, 71-311 Szczecin, Poland)

Abstract

A significant number of new metered parking systems have been introduced in recent years by the local authorities of various spa towns in Poland in connection with home zone conversion projects. The traffic signs posted in these locations were limited to the beginning and end of the demarcated parking area. Traffic circle (TC) is an example of a traffic calming measure (TCM) used in home zones to slow down the traffic (case study—home zone in a small spa village). This article presents the results of a study investigating the speed reductions obtained within a home zone and a traffic circle used as traffic calming measure. The indispensable speed surveys were carried out in relation to this study in two periods: in summer when the streets are crowded with tourists and in September with little pedestrian traffic. Two research hypotheses were formulated as part of the speed data analysis to verify the slowing effect of the traffic circle and the relevance of the traffic circle’s design parameters and location, road function and the surrounding streetscape. For each hypothesis, statistical analyses were carried out using two nonparametric tests: two-sample Kolmogorov–Smirnov test and median test. The third research hypothesis formulated in this study was related to sustainable development factors related to fuel consumption and traffic-related air pollution, including carbon dioxide, carbon monoxide, nitrogen oxide and hydrocarbons. This hypothesis was verified by estimating the amount of air pollution in the home zone under analysis in three different situations (scenarios): in summer with the travel speed reduced by pedestrian traffic to ca. 8–10 km/h, in September with a small number of pedestrians and 20–25 km/h resulting speed between traffic circles, reduced at the traffic circle, and in a theoretical 30 km/h zone with 25–30 km/h assumed speed between traffic circles, dropping at the traffic circle. These analyses confirmed the appropriateness of the traffic circle as a home zone traffic calming measure, as long as its design is based on a detailed analysis of the relevant factors, including location, road function and the surrounding streetscape.

Suggested Citation

  • Stanisław Majer & Alicja Sołowczuk, 2023. "Traffic Circle—An Example of Sustainable Home Zone Design," Sustainability, MDPI, vol. 15(24), pages 1-27, December.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:24:p:16751-:d:1298582
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    References listed on IDEAS

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    1. Sotiris Vardoulakis & Rachel Kettle & Paul Cosford & Paul Lincoln & Stephen Holgate & Jonathan Grigg & Frank Kelly & David Pencheon, 2018. "Local action on outdoor air pollution to improve public health," International Journal of Public Health, Springer;Swiss School of Public Health (SSPH+), vol. 63(5), pages 557-565, June.
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