- Urban roads
Roads with certain technical conditions and facilities that are passable for vehicles and pedestrians within a city limits. According to the road’s position in the road network, traffic function and service function to buildings along the road and urban residents, urban roads are divided into expressway, trunk road, secondary trunk road, branch road and residential road。
- Fast roads
A road in a city with a long distance, a large volume of traffic and a rapid transit service. The middle division belt is set between the opposite lane of the expressway, and the import and export adopt full control or partial control.
- Main road
Main roads connecting the main districts of the city, in the form of separation between motor and non-motor vehicles, such as three roads or four roads.
- Secondary trunk road
A road that combines with trunk roads to form a network and serves as a distribution road.
- Branch road
Connecting road between secondary trunk road and residential road.
- Residential road
Roads and lanes mainly used by pedestrians and non-motor vehicles in residential areas.
- Conventional lighting
The lamp is mounted on a lamp pole with a height of 15m or less, and is continuously arranged on one side, both sides or the middle of the road according to a certain spacing for lighting. In this way, the longitudinal axis of the luminaire is perpendicular to the road axis, so that most of the light emitted by the luminaire is directed towards the longitudinal axis of the road.
A lighting system in which a set of lamps are mounted on a pole with a height of 20 meters or higher to illuminate a large area.
- Half high pole lighting (also known as middle pole lighting)
A lighting method in which a set of lamps are installed on a lamp pole with a height of 15 to 20m. When the lamps and lanterns are configured in accordance with the conventional lighting mode, they are conventional lighting; When the luminaire is configured according to the high pole lighting, it belongs to the high pole lighting.
- Truncated lamps and lanterns
The Angle between the {zd0} direction of light intensity and the downward vertical axis of the lamp is between 0° ~ 65°, and the allowable value of {zd0} in the direction of 90° Angle and 80° Angle is 10cd/1000lm and 30cd/1000lm, respectively. Regardless of the light flux of the source, the light intensity {zd0} value in the direction of 90° shall not exceed 1000cd.
11, half light type lamp
The Angle between the {zd0} direction of light intensity and the downward vertical axis of the lamp is between 0° ~ 75°, and the allowable value of {zd0} in the direction of 90° Angle and 80° Angle is 50cd/1000lm and 100cd/1000lm, respectively. Regardless of the light flux of the source, the light intensity {zd0} value in the direction of 90° shall not exceed 1000cd.
- Non-truncated luminaire
The {zd0} light intensity direction is not limited, and the {zd0} light intensity value in the direction of 90° Angle shall not exceed 1000cd.
A projector for flood illumination with a beam diffusion Angle (the Angle between two directions where the intensity is 1/10 of the peak intensity) greater than 10°. Usually rotates and points in any direction.
- Lamp efficiency
The ratio of the total luminous flux from the luminaire to the total luminous flux from all light sources within the luminaire under the same service conditions.
- Maintenance coefficient
The ratio of the average illuminance or brightness on a specified surface after a certain period of use to the average illuminance or brightness obtained on the same surface when the device is newly installed under the same conditions.
- Installation height of lamps and lanterns
Vertical distance from light center of luminaire to road surface.
- Installation spacing of lamps and lanterns
The distance between two adjacent light fixtures measured along the center line of the road.
- Overhang length
The horizontal distance between the light center of the lamp and the adjacent curb is the horizontal distance between the lamp and the curb.
- Length of lamp arm
The horizontal distance from the vertical center line of the light pole to the point at which the arm is inserted into the luminaire.
- Effective pavement width
The theoretical width of the pavement used in the design of road lighting, which is related to the actual width of the road, the cantilever length of the luminaire and the arrangement of the luminaire. When the lamps are arranged on one side, the effective road width is the actual road width minus one overhang length. When the luminaries are double-sided (both staggered and opposite), the effective road width is the actual road width minus two overhang lengths. When the luminaire adopts the center symmetrical arrangement on the middle division belt of the double road, the effective width of the road is the actual width of the road.
- Inducement
Proper installation of light poles and lamps along the road can provide drivers with visual information about the direction, line type and slope of the road ahead, which is called the guidance of lighting facilities.