| Alternative title | Une étude systématique de la visibilité nocturne par les feux d'éclairage de véhicules automobiles |
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| Download | - View final version: A systems engineering study of night visibility with automobile headlighting (PDF, 5.4 MiB)
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| DOI | Resolve DOI: https://doi.org/10.4224/40003116 |
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| Author | Search for: Pinkney, H. F. L.1; Search for: Ayad, A. A.1; Search for: Huculak, P.1; Search for: Harrison, A. L.1 |
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| Affiliation | - National Research Council of Canada, National Aeronautical Establishment
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| Format | Text, Technical Report |
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| Physical description | 71 p. |
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| Abstract | The question of night visibility with automobile headlighting is studied using a systems approach.
A methodology has been developed to isolate all the independent variables affecting night driving visibility such as sources, reflective surfaces, transmission media and observer.
It is shown that correlation was achieved between the results obtained from field experiments for the unopposed roadway obstacle detection task and corresponding calculations based on accurate field illumination engineering data and observer laboratory visual performance data.
Using the luminance difference method developed during the visual performance studies, the report demonstrates how the illuminance characteristics of the source interacting with the scene luminance factors can affect the luminance difference signal available for detection (Δ Lₐ) with respect to the luminance difference signal required by the observer (ΔLᵣ).
Examples of the application of this type of approach are also given to analyze the unopposed case and the interaction with other sources of illuminance such as moonlight, dusk skylight and opposing headlights. By means of these examples the sensitivity of visibility to the field, source and task parameters is also shown.
Extension of the methodology to statistical population performance evaluations is outlined and current research in progress for obtaining a statistical measure of the parameters affecting headlamp population behaviour is briefly outlined. |
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| Publication date | 1978-01-11 |
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| Publisher | National Research Council of Canada. National Aeronautical Establishment |
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| Series | |
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| Language | English |
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| Peer reviewed | No |
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| NRC number | NRCC 16322 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | cb32a4f5-11b3-4deb-ae0a-cbf3886ea9d2 |
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| Record created | 2023-07-31 |
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| Record modified | 2023-08-01 |
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