JPH10292318A - Road facility structure for winter road - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a visual guidance effect, i.e., visibility, in a winter road by setting the lightness of the color of the surface of a structure installed on the road in a snow-cover cold district in a specific L value or less. SOLUTION: The lightness of the color of the surface of a structure installed on a road in a snow-cover cold district is set in an L value 60 or less. The color of the surface of the structure is executed by painting. The structure for the road is used for a strut for a fence for the road, a snow protection fence, or a road sign, a delineator, a curve mirror, a traffic signal, etc. Accordingly, a visual guidance effect, i.e., visibility in the winter road can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a snow fence, a protective fence,
The present invention relates to a structure of a road facility such as a guardrail, a railing, and a gaze guide.

[0002]

2. Description of the Related Art In a winter road environment in a snowy cold region, since the road surface and the driving background are covered with snow, it is extremely difficult for a driver to determine a roadside position, and there is a risk of departure from the road. For this reason, in cold snowy regions, safety facilities such as snow poles that indicate roadside positions have been installed to encourage drivers to gaze on winter roads. In addition, although luminous bodies such as LEDs and halogen lamps are used to promote gaze guidance, these luminous bodies are effective at night, but in the daytime, the illuminance of the background exceeds the luminous luminance and the visibility for the driver is improved. It is hard to say that it is excellent.

Further, structures provided on roads such as snow fences, protection fences, guard rails, railing, and gaze guides have been conventionally subjected to surface treatment such as galvanization or painting as rust prevention treatment. However, the purpose of these surface treatments is primarily to improve the durability of the structure, and only to provide a scenic effect as a measure against landscape.

[0004] These road facility structures are often installed at the median strip or on the road side of the road, and the driver's line of sight during winter road traffic may be driven by judging the continuity of the contrast of the road facility. Many. However, current road facilities are often provided with anticorrosion treatment of the same color as snow, such as hot-dip galvanizing and white paint, and no consideration is given to gaze guidance on winter roads, that is, visibility. There is no situation.

[0005]

SUMMARY OF THE INVENTION Under the above-mentioned circumstances, the present invention has been studied diligently from the viewpoint of traffic engineering, that is, the gaze guidance effect on the color or paint color of the road facility structure, from the viewpoint of traffic engineering. It was found that the lightness range of the color suitable for safe driving.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail through the following tests. These tests were conducted on a panel painted achromatically for each brightness, with a visibility test using a monitor,
Calculation of the contrast between the snow background and the color.

Test 1 First, a test specimen displaying the brightness was prepared. The specimen is
The achromatic color brightness is divided into 10 levels based on the approximate Munsell value, and the A4 size panel is painted. Table 1 shows the relationship between the specimen and the Munsell value. Note that the matting type was used for the coating because of concerns about the reflection of sunlight.

[Table 1]

The lightness was measured using these test specimens. Nippon Denshoku: SQ-300H was used for the lightness measurement. Table 2 shows the measurement results of the brightness, and FIG. 1 shows a graph.

[Table 2]

Test 2 Here, the relationship between the lightness of the paint and the visibility in the background of a daytime winter road is clarified. The test specimens used were those used in Test 1.・ Test method: Daytime snowstorm (Visibility: 200m-30)
0m), a five-level evaluation of visibility was performed on 15 monitors with a visual acuity of 1.0 or more, including correction with eyeglasses. In addition,
The size of each specimen was A4, and the distance from the specimen to the monitor was 100 m.・ Evaluation method: Depends on 5 grades 5: Very good appearance 4: Good appearance 3: Visible 2: Barely visible 1: Invisible ・ Result: Average score of 5 grades evaluation for each specimen
Shown in

[Table 3]

Test 3 Using this specimen, the contrast with the background snow was calculated. The formula for calculating the contrast is as follows. C = | Bs−Bo | / Bo C: contrast Bs: luminance of the specimen (cd / m ² ) Bo: luminance of the background (snow background) (cd / m ² ) Active contrast (Bo <B)
s) and negative contrast (Bs <Bo). The contrast due to the paint color in this test is due to the negative contrast, in which the luminance of the specimen is lower than the background luminance.・ Set each specimen outdoors and measure the luminance of the painted surface and the luminance of the background (snow scene). For luminance measurement, use MINOLTA: CS
-100 was used.・ Measurement direction: 4 directions of north, south, west and east (if the measurement direction is north, the specimen will face south) ・ Measurement height: 1.2m (line of sight from ordinary car driver) ・ Measuring distance : 1.0 m from the front of the test specimen-Measurement interval: 1 hour Using the luminance measurement results obtained here, the contrast was calculated and evaluated. The larger the value of the contrast, the better the visibility. Table 4 shows the measured values of the contrast.

[Table 4]

Test 4 Red (glossy), blue (matte), brown (glossy), white (glossy), 89.1 mm in diameter, often used for rust prevention treatment of road facilities and landscape consideration , Length 1500mm
Was painted on the support to make a specimen. Further, a blank subjected to hot-dip galvanizing was also subjected to the test. Table 5 shows the approximate Munsell values of these specimens.

[Table 5]

Further, the lightness of the specimen colored in each color was measured. Nippon Denshoku: SQ-300H was used for the lightness measurement. Other measurement conditions are as follows.・ Set each specimen outdoors and measure the luminance of the painted surface and the luminance of the background (snow scene). For luminance measurement, use MINOLTA: CS
-100 was used.・ Measurement direction: North direction (when the measurement direction is north, the specimen faces south) ・ Measurement height: 1.2 m (line of sight from the driver of a normal car) ・ Measurement distance: 1. 0 m Measurement interval: 1 hour Result: The measurement results of the brightness of each specimen are shown in Table 6, and the graph is shown in FIG.

[Table 6] The contrast was calculated and evaluated using the luminance measurement results obtained here.

Test 5 Further, the relationship between visibility and contrast in a snowy background was clarified using the test specimen used in Test 1.・ Test method: Daytime snowfall (Visibility distance: 500m-80)
0m), the background of the snow and the luminance of each specimen were measured, and the contrast was calculated. Result: FIG. 3 shows the correlation between the visibility and the contrast of each test piece based on the five-level evaluation.

[0014]

As described above in detail, there is a clear correlation between the brightness of the structure of the road facility in the background of snow and its contrast and visibility through the above-mentioned tests, and a brightness (L value) of 60 or less is visually recognized. It was clarified that it was excellent. By applying a color in such a lightness range to the structure of the road facility, the gaze guidance effect on a winter road, that is, the visibility is improved, contributing to traffic safety.

[Brief description of the drawings]

FIG. It is a graph which shows the lightness (L value) of 1-10.

FIG. 2 is a graph showing the lightness (L value) of a colored coated body.

FIG. It is a graph which shows the correlation of 1-10 contrast and visibility.

Claims (5)

[Claims] 1. A road facility structure for a winter road, wherein the brightness of the color of the surface of a structure provided on a road in a snowy cold region is within an L value of 60 or less. 2. The road facility structure for a winter road according to claim 1, wherein the color of the surface of the structure is applied by painting. 3. The road structure according to claim 1, wherein the road structure is a road fence.
And a road facility structure for a winter road according to claim 2. 4. The road facility structure for a winter road according to claim 1, wherein the road structure is a snow fence. 5. The road structure is a road sign, a gaze guide,
The road facility structure for a winter road according to claim 1, which is a support for a curved mirror, a traffic signal, or the like.