== Abstract ==

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Abstract. The protection of vulnerable road users (VRU) is a key issue of future driver assistance systems. An important point is to determine whether a VRU is visually hidden to the driver. This additional information is essential for the driver to prevent an accident or to reduce its severity. We show that by using a transponder attached at the VRU, wavelength dependent diffraction effects can be utilized to distinguish between visible and hidden VRUs. Several diffraction measurements were carried out taking place in open space areas with simple big scattering objects and in different road traffic scenarios demonstrating a reliability of nearly 100%. If future driver assistance systems for detecting VRUs are complemented with automotive electronics which enable distinction between visible and hidden VRUs, accidents can be avoided.                     

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Document type: Article

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== Full document ==

<pdf>Media:Draft_Content_118167542-beopen206-1743-document.pdf</pdf>

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== Original document ==

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The different versions of the original document can be found in:

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* [https://www.adv-radio-sci.net/7/49/2009 https://www.adv-radio-sci.net/7/49/2009] under the license https://creativecommons.org/licenses/by

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* [https://www.adv-radio-sci.net/7/49/2009/ars-7-49-2009.pdf https://www.adv-radio-sci.net/7/49/2009/ars-7-49-2009.pdf]

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* [http://www.adv-radio-sci.net/7/49/2009/ars-7-49-2009.pdf http://www.adv-radio-sci.net/7/49/2009/ars-7-49-2009.pdf],

: [https://doaj.org/toc/1684-9965 https://doaj.org/toc/1684-9965],

: [https://doaj.org/toc/1684-9973 https://doaj.org/toc/1684-9973] under the license cc-by

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* [https://ars.copernicus.org/articles/7/49/2009/ars-7-49-2009.pdf https://ars.copernicus.org/articles/7/49/2009/ars-7-49-2009.pdf],

: [http://dx.doi.org/10.5194/ars-7-49-2009 http://dx.doi.org/10.5194/ars-7-49-2009]

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* [https://ars.copernicus.org/articles/7/49/2009/ars-7-49-2009.pdf https://ars.copernicus.org/articles/7/49/2009/ars-7-49-2009.pdf],

: [https://ui.adsabs.harvard.edu/abs/2009AdRS....7...49F/abstract https://ui.adsabs.harvard.edu/abs/2009AdRS....7...49F/abstract],

: [http://www.adv-radio-sci.net/7/49/2009/ars-7-49-2009.pdf http://www.adv-radio-sci.net/7/49/2009/ars-7-49-2009.pdf],

: [https://noa.gwlb.de/receive/cop_mods_00030312 https://noa.gwlb.de/receive/cop_mods_00030312],

: [https://www.adv-radio-sci.net/7/49/2009/ars-7-49-2009-metrics.html https://www.adv-radio-sci.net/7/49/2009/ars-7-49-2009-metrics.html],

: [https://academic.microsoft.com/#/detail/2130554785 https://academic.microsoft.com/#/detail/2130554785] under the license https://creativecommons.org/licenses/by/3.0/

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