That is not meant as a police man berfrofesi was sleeping and dreaming like to meet with Lord Shiva ... hehehe, but police sleep is meant here is the speed limiter device that transverse the category of highway or highway in the Village housing complex.
Police Sleeping intended speed limiters made by elevating the highway with asphalt or cement that is placed across the road to slow the rate of sign / speed of the vehicle.
To improve the safety and health of road users and if the height is set via the path that will be equipped with signs prior notice of the existence of speed bumps, especially at night, then sleeping policemen equipped with oblique lines road markings with white or yellow contrasting.
Police Sleeping is the Minister of Communications No. 3 of 1994 on Controls and User Security Road, where the tilt angle is 15% and a maximum height of not more than 120 mm, placement of speed limiting devices on the traffic lane markings must be equipped with the oblique line white or yellow paint, it's just, sleeping police in Indonesia are generally much more as opposed to design bumps arranged. so as this can compromise the security and safety and health of the road users.
etymology
It is unclear who the creator of the phrase bump and since when the phrase was used in Indonesian. There is a possibility this term is derived from British English sleeping policeman
Health
Bump height settings should be set so as not to endanger road users because of the height of the bumps associated with the time passing the burden and weight of the upper body will make a significant stress on the lower section of the body structure of the back, especially on the disc between the fifth lumbar and first sacral vertebrae were known as L5 / S1 lumbosacral disc or by calculation (\ sum (moments at the L5 / S1 disc) = 0) or removal of the load with the weight of the upper body (Mload-to-torso = Wload * h + Wtorso * b} that may cause a risk of injury or high risk for osteoporosis sufferers
Speed limiting devices placed on:
- Road in the residential neighborhood
- The local roads that have street grade IIIC
- In the streets of construction work being done
- Placement performed on transverse position perpendicular to the carriageway.
- When repetition is the placement of speed limiting devices must be adapted to the study of management and traffic engineering.
Dynamic speed bumps
Dynamic speed bumps differ from conventional bump which will only be active if the vehicle passing over it drove exceeds a certain speed limit. Kecepaan oncoming vehicle that does not exceed the limit will not have the effect of the bump. Dynamic speed bumps allow the passage of emergency vehicles at high speed.
In one design, a rubber fitted with a pressure valve that is able to determine the speed of a vehicle. If the vehicle is traveling below the speed limit tercebut the valve will open and the bump will be flat when vehicles pass over it, but the valve remains closed when the vehicle is going too fast. The valve can also be set to allow heavy vehicles, such as fire engines, ambulances, and buses to pass at high speed.
Thus the meaning of Sleeping Police