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Editor’s Choice articles are based on recommendations by the scientific editors of MDPI journals from around the world. Editors select a small number of articles recently published in the journal that they believe will be particularly interesting to readers, or important in the respective research area. The aim is to provide a snapshot of some of the most exciting work published in the various research areas of the journal.

Ciampa D, Olita S. Mountain Roads’ Geometric Design: Methodological Proposal for Hairpin Bend Design/Retrofitting. Infrastructures. 2022; 7(9):112. https://doi.org/10.3390/infrastructures7090112

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Ciampa D, Olita S. Mountain Roads’ Geometric Design: Methodological Proposal for Hairpin Bend Design/Retrofitting. Infrastructures. 2022; 7(9):112. https://doi.org/10.3390/infrastructures7090112

Abstract: Mountainous roads often have to overcome considerable differences in height, which is why hairpin bends find a valid and common use. Despite this, there is a lack of specific international standards. Given the absence of a national standard governing the mountain roads’ design, in Italy, as in many other countries, the Swiss standard SNV 640198a is generally applied. This standard does not guarantee the correct geometric design of hairpin bends for Italian vehicle fleets and fleets according to the Directive 2002/7/EC. In this paper, the authors have developed a new methodology based on the Swiss standard upgrade, which is applicable internationally. Starting from hairpin bends’ geometric layouts provided by SNV 640198a and from related considerations, respectively, to the gyration formulae use and to swept path analysis’ simulations, they developed new planimetric layouts compatible with the vehicle fleet and with the cross-sectional dimensions of Italian roads. In this way, a generally valid methodology applicable to any international context was defined. In particular, the study allowed the definition of new geometric layouts to be used in hairpin bend design/retrofitting when it is necessary to guarantee the simultaneous entry into the bend of a 12 m long bus, and a car travelling in the opposite direction. Finally, the proposed methodology was applied to a mountain road case study in the Lucanian Dolomites area; an area of great tourist, cultural and environmental interest in southern Italy. Keywords: mountain roads; hairpin bends; gyration formulae; swept path analysis

Ciampa, D.; Olita, S. Mountain Roads’ Geometric Design: Methodological Proposal for Hairpin Bend Design/Retrofitting. Infrastructures 2022, 7, 112. https://doi.org/10.3390/infrastructures7090112

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Feature papers represent the most advanced research with significant potential for high impact in the field. A Feature Paper should be a substantial original Article that involves several techniques or approaches, provides an outlook for future research directions and describes possible research applications.

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Ciampa, D.; Olita, S. Mountain Roads’ Geometric Design: Methodological Proposal for Hairpin Bend Design/Retrofitting. Infrastructures 2022, 7, 112. https://doi.org/10.3390/infrastructures7090112

Ciampa, Donato, and Saverio Olita. 2022. "Mountain Roads’ Geometric Design: Methodological Proposal for Hairpin Bend Design/Retrofitting" Infrastructures 7, no. 9: 112. https://doi.org/10.3390/infrastructures7090112

Ciampa, Donato, and Saverio Olita. 2022. "Mountain Roads’ Geometric Design: Methodological Proposal for Hairpin Bend Design/Retrofitting" Infrastructures 7, no. 9: 112. https://doi.org/10.3390/infrastructures7090112

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