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Sensors 2019, 19(6), 1360;

Optical Detection of Dangerous Road Conditions

NooEL—Nonlinear Optics and OptoElectronics Laboratory and CNIT—Photonic Networks and Technologies National Lab, Department of Engineering, University ROMA TRE, Via Vito Volterra 62, 00146 Rome, Italy
Author to whom correspondence should be addressed.
Received: 13 February 2019 / Revised: 11 March 2019 / Accepted: 12 March 2019 / Published: 19 March 2019
(This article belongs to the Section Physical Sensors)
PDF [2103 KB, uploaded 19 March 2019]


We demonstrated an optical method to evaluate the state of asphalt due to the presence of atmospheric agents using the measurement of the polarization/depolarization state of near infrared radiation. Different sensing geometries were studied to determine the most efficient ones in terms of performance, reliability and compactness. Our results showed that we could distinguish between a safe surface and three different dangerous surfaces, demonstrating the reliability and selectivity of the proposed approach and its suitability for implementing a sensor. View Full-Text
Keywords: optical sensor; scattering from rough surfaces; polarized scattering; polarization contrast ratio optical sensor; scattering from rough surfaces; polarized scattering; polarization contrast ratio

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Piccardi, A.; Colace, L. Optical Detection of Dangerous Road Conditions. Sensors 2019, 19, 1360.

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