Classification of traffic signs

Road traffic signs are divided into main signs and auxiliary signs.

The main signs are divided into warning signs, prohibition signs, indicating signs, guiding signs, tourist area signs and road construction safety signs. Play a role in prohibiting certain behaviors. * * * There are 43 kinds. Signs prohibiting or restricting the traffic behavior of vehicles and pedestrians. Except for individual signs, the colors are white background, red circle, red bar, black pattern and pattern layering; An equilateral triangle with a circle, an octagon and a downward vertex. Set in the road or near the intersection where it is necessary to prohibit or restrict the traffic behavior of vehicles and pedestrians.

Play a guiding role. * * * There are 146 species. Signs conveying information of road direction, location and distance. In addition to milestones and 100-meter piles, the color is generally blue and white; Expressway generally has a green background and a white pattern; Except for location identification signs, milestones and confluence signs, the shapes are usually rectangular and square. It is set near the road section or intersection where the direction, position and distance information of the road need to be transmitted.

Generally speaking, the basic meanings of traffic sign colors are as follows:

A. Red: indicates prohibition, stop and danger. Borders, background colors, slashes, and background colors used for prohibition signs, cross symbols, and slash symbols, as well as warning linear guidance targets.

B Yellow or fluorescent yellow: indicates warning and is used as the background color of warning signs.

C. Blue: indicates instruction and compliance, and is used to indicate the background color of the logo; It represents the driving information such as place name, route and direction, and is used as the background color of general road guide signs.

D. Green: indicates the driving information such as place names, routes and directions, and is used as the background color of road signs of expressway and urban expressways.

E. Brown: the indication of tourist areas and scenic spots, which is used as the background color of tourist area signs.

F Black: Text, graphic symbols and borders used for some signs.

G white: used as the background color of signs, text and graphic symbols, and as the border of some signs.

Orange or fluorescent orange: used for warning and guiding signs in road operation areas.

1. Fluorescent yellow-green: a warning sign for pedestrians and children.

The general rules for the shape of traffic signs are as follows:

A. equilateral triangle: used for warning signs;

B. circle: a sign for prohibition and indication;

C. Inverted equilateral triangle: a prohibition sign for "slowing down and giving way";

D. octagon: a prohibition sign for "stopping and giving way";

E-cross: the warning sign of "grade crossing cross symbol of railway";

F. Square: used for guiding signs, some warning, prohibition and indication signs, tourist area signs, auxiliary signs and notification signs. A) indoor lighting signs

The lighting device is installed in the sign board, which is made of translucent material and has two kinds of single-sided display and double-sided display. The indoor lighting sign can be designed according to the size of the sign board and the wind force it bears. Ensure uniform illumination on the sign surface, and the night sight distance 150m. The light box structure is reasonable, the metal parts are treated with anticorrosion, waterproof and dustproof, the electrical parts are durable and reliable, and the maintenance is convenient.

B) external lighting signs

The way the external light source illuminates the sign surface.

The light source of external lighting signs should be specially designed. Lighting lamps and their shadows will not affect sign recognition. The illuminance of external light source on the sign surface should not be obviously uneven, and the uniformity (maximum illuminance/minimum illuminance) should be lower than 4 to ensure the sight distance of 150m at night. The external light source will not dazzle the drivers on the road.

The parts supporting the lamps should be rust-proof, and the lighting device should be durable and reliable, with excellent performance and convenient maintenance.

Traffic signs can use aluminum alloy plates, extruded aluminum alloy profiles, thin steel plates, synthetic resin plate, etc. The materials used shall conform to the provisions of the current Highway Traffic Signs (TI'/T 279), and the thickness shall be determined by calculation. (1) Traffic sign poles and beams can be made of steel pipes, I-beams, channel steel and reinforced concrete, and the top of steel pipes should be provided with column caps. Steel members should be treated with anticorrosion.

(2) The traffic sign should be reinforced concrete foundation, and the single-column traffic sign located in the bridge area can be attached to the steel structure bridge.

structural design

1. The design basic wind speed should be the local flat open ground, which is higher than the ground lOm, and the average maximum wind speed with a return period of 50 years lOmin should not be less than 22m/s. ..

2. The structure of traffic signs should be designed according to the limit state of bearing capacity and the limit state of normal use, and should meet the structural and technical requirements at the same time.

3. The structural importance coefficient of traffic signs can be divided into two grades:

(1) Cantilever and portal traffic signs located at No.7 of expressway and First Class Highway, structural importance coefficient.

(2) The structural importance coefficient y of other types of traffic signs located in expressway and Grade I highways and traffic signs located in other grades of highways. =0.9。

4. The load calculation and combination, limit state design method and foundation design of traffic sign structures should comply with the current General Code for Design of Highway Bridges and Culverts (JTC D60), Design Code for Foundation and Foundation of Highway Bridges and Culverts (JTJ 024), Design Code for Steel Structures (JB 500 17) and Road Traffic Signs and Lines (JB 5768).