Influence of Visual Environments on Visibility of Traffic Signs

Akagi, Yukiharu; Seo, Takuya; Motoda, Yoshitaka

doi:10.3141/1553-08

Cited by 8 publications

(7 citation statements)

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“…phone numbers, were proven to cause greater distraction. Several studies revealed that advertisements along roads are associated with an increase in drivers' reaction times (Akagi et al, 1996;Clark & Davies, 2008;Edquist et al, 2011;Ewert, 2011). Crundall et al (2006) discovered that drivers who are looking for potential hazards fix their eyes on street-level advertisements, probably as they unwillingly focus on the distracting content while looking for, e.g., pedestrians.…”

Section: Roadside Advertisingmentioning

confidence: 99%

Utilizing Spatial Video to Analyse Roadside Advertisements in Villach, Austria

Strelnikova¹,

Schneider²,

Leitner³

2018

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Spatial video technology allows the acquisition of video data that includes information about the geographical location of each recorded frame. Such data are captured mostly for entertainment or as part of various sports activities. However, due to the potential of spatial video data to be used for location-based purposes, such as disaster and health management, spatial video technology has been receiving more attention from the scientific community. This paper discusses the capabilities of spatial video technology to serve as a data acquisition tool in an urban environment, using the example of roadside advertising analysis in the city of Villach, Austria. The study shows that the application of spatial video technology helps to reduce the data acquisition time and uncovers further advantages, but also some limitations of this method. The data acquired are used to reveal patterns of spatial distribution of roadside advertisements. These can be used to analyse the effects of advertising in the urban environment, such as distracting road users.

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Section: Roadside Advertisingmentioning

confidence: 99%

Utilizing Spatial Video to Analyse Roadside Advertisements in Villach, Austria

Strelnikova¹,

Schneider²,

Leitner³

2018

giforum

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“…Several studies have shown that post-mounted signs have a low registration rate (i.e., some drivers do not attend to or notice them), and the registration of post-mounted signs can be further hampered by the presence of heavy vehicles and other traffic as well as visual clutter in urban environments (2)(3)(4)(14)(15)(16). Therefore, given their targeted location within the driving path, pavement marking signs are more likely to be detected by drivers than post-mounted signs.…”

Section: Literature Reviewmentioning

confidence: 99%

Field Evaluation of Elongated Pavement Marking Signs

Chitturi

Alsghan

Santiago

et al. 2017

Transportation Research Record: Journal of the Transportation R

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Research has shown that elongated pavement marking letters and arrows significantly improve recognition distance; however, the effect of elongated pavement marking signs, which are symbolized pavement markings that are elongated versions of signs, has not been evaluated. The goal was to evaluate the effectiveness of elongated pavement marking signs in conjunction with the post-mounted signs they complement. Results from a driving simulator evaluation indicate that recognition distance increases quadratically as elongation ratio (i.e., the ratio of height to width) increases. Considering the trade-off between cost and recognition distance, an elongation ratio of 5:1 was chosen for field evaluation of speed limit regulatory signs and curve warning signs. A before-and-after study was conducted at sites in Kansas, Missouri, and Wisconsin. Operating speeds of free-flow vehicles were used as the measure of effectiveness; speed data were collected upstream of, at, and downstream of the corresponding post-mounted sign. The speed limit sign was tested at four sites (at least one in each state) and was found to reduce operating speeds effectively at three of the four sites. A curve warning sign was tested at three sites (two in Kansas, one in Wisconsin), and operating speed reductions were observed at two of the sites. Field data results indicated that the evaluated regulatory and warning elongated pavement marking signs reduced vehicle speeds. This demonstrates they can be effective in reinforcing a warning or a regulatory message to drivers. Future research should evaluate durability and long-term effectiveness and should test other signs.

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“…The concept of "visual noise" refers to non-target objects in an environment and can be used to determine a sign's conspicuity in a particular environment. Akagi et al (12) state that "Objects causing visual noise can be defined as objects that hinder drivers' field of view, such as billboards and buildings along roadsides." This study reported that increases in the visual noise (i.e., the number of signs in a roadway location) correlated with longer search time required for drivers to locate a target sign.…”

Section: Conspicuity Of Displaysmentioning

confidence: 99%