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What are the design standards for street lamps-2
- Dec 19, 2018 -

What are the design standards for street lamps

1. General road lighting arrangement (arrangement of street lamps). When the width of the road does not exceed 15m, the single-side lighting is usually used.
(a) single side lamp placement (b) center line lamp placement (c) two side cross lamp placement (d) two side symmetrical lamp placement
1- pole 2- street lamp 3- cable 4- isolation belt
When there are shops or Windows on both sides of the road with high lighting intensity, central lighting can be adopted. In the relatively wide highway or on, under the lane, can also use the way of central lighting. If there are poles on both sides of the road, you can pull a cable and hoist the lamp above the center line of the road. It is also possible to pull a cable-cloth lamp over the isolation belt. The width of the road is in 12 ~ 15m of the second, third class highway, often use Central Line cloth lamp. The advantage is more uniform illumination. The disadvantage is that the lamps and lanterns in the center of the road maintenance is not very convenient. When the width of the road surface is greater than 15m, and the vehicle and pedestrian are more, emphasize beautiful again when, can use two side crisscross cloth lamp or two side symmetry cloth lamp.
When making a design actually, often can be restricted by a lot of objective conditions, for example the road surface is wider and when can only one-sided cloth the lamp, can increase the elevation Angle of lamps and lanterns, can increase commonly to 15 degrees Angle. If the elevation Angle is too large, the luminescence efficiency of the lamp will be reduced, and it is easy to produce glare.
2. If the lights at the intersection are t-shaped, it is better to set the lamps at the opposite end of the road, which can not only effectively illuminate the road surface, but also help the driver to identify the end of the road.
Intersections of cloth lights
(a) lighting at t-junctions (b) lighting at intersections
In the intersection spacing of lights should be reduced, the street light is best set in the direction of the car to the right of the driver's line of sight, so that the driver can easily see across the intersection of pedestrians or vehicles. In the intersection of various lamps and lanterns have the corresponding main function, is from the road (1) to the right of the car and the road (4) to the left of the car and set. In the same way, the functions of lamp b, lamp c and lamp d can be analyzed.
Lights hanging in the center of intersections often use red lampshades to attract the attention of drivers. In complex traffic intersections, in order to attract the attention of drivers in advance, it is also effective to change the type of lamps or the type of light source (i.e., change the luminous flux of lamps) in the nearby road sections. Intersection design illuminance standard requirements are higher, generally not less than the sum of several intersection illuminance standards.
If the illumination standards of intersecting roads differ greatly, driving into dark areas from bright areas will lead to a sharp decline in visual function due to the "dark adaptation time" of human eyes. Therefore, it is necessary to set up the transition section in the dark intersection, and the length of the transition section is generally not less than 100m.
The transition section of road lighting when the brightness difference is large
(a) no lighting overshoot (b) lighting overshoot