Research of influences on retroreflectivity of traffic signs

Ing. Mariia Khrapova

Disertační práce

Abstract:

The retroreflectivity of traffic signs plays a crucial role in ensuring the safety of road users. However, this optical property is highly susceptible to the influence of a range of external factors. The main focus of this study was to investigate the effect of various external factors on the level of retroreflectivity of traffic signs, including accelerated natural weathering, climate conditions, dirtiness, precipitation, exposure to sunlight, the material of the sign panel, measurement conditions and equipment, orientation, and regulations. The study was conducted by formulating and testing 17 hypotheses based on a thorough literature review. The results of this study provide valuable insights into the factors that can impact the retroreflectivity of traffic signs and present recommendations for the maintenance and replacement of traffic signs to ensure their adequate visibility.

Keywords

retroreflective sheeting, in-service traffic signs, coefficient of retroreflection, external factors, measurement conditions, national standard

Jazyk práce: angličtina

Datum vytvoření / odevzdání či podání práce: 27. 2. 2023

Obhajoba závěrečné práce

• Vedoucí: doc. Ing. Miroslav Růžička, CSc.
• Oponent: František Kumhála, prof. Dr. Ing., Jan Krmela, externi, Tomáš Tichý, Ing., externi

Česká zemědělská univerzita v Praze

Technická fakulta

Doktorský studijní program / obor:
Speciální technologie / Jakost a spolehlivost strojů a zařízení