Artificial road roughness

The lying police officer (from English sleeping policeman) — the term came from England and initially "the sleeping police officer" was called. It is the hump (usually an eminence) on the carriageway used for restriction of speed of the movement of vehicles. The official term — artificial (road) roughness or an element of compulsory reduction of speed.
Most often is established in residential zones or near crosswalks, etc.
The principle of action is that when crossing to the high speed of the lying police officer there is car suspension bracket concussion. Such concussions lead to gradual failure of various knots of the vehicle: racks, spherical hinges, stupichny bearings, tips of steering drafts and others. Not to bring closer the term of the next repair, drivers are forced not to exceed the established speed.
Lying police officers of new generation are made of the used tires, and inside there passes the plastic design [1].
Also the latests version are equipped with system of antifrosting. In winter time it is recommended to dismantle for effective work of snow - removing equipment.