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Speed wobble (also known as shimmy, tank-slapper, [1] or death wobble) is a rapid side-to-side shaking of a vehicle's wheel(s) that occurs at high speeds and can lead to loss of control. It presents as a quick (4–10 Hz) oscillation of primarily the steerable wheel(s), and is caused by a combination of factors, including initial disturbances ...
Roadway noise is the collective sound energy emanating from motor vehicles. It consists chiefly of road surface, tire, engine/transmission, aerodynamic, and braking elements. Noise of rolling tires driving on pavement is found to be the biggest contributor of highway noise and increases with higher vehicle speeds. [1] [2] [3]
Automobile handling and vehicle handling are descriptions of the way a wheeled vehicle responds and reacts to the inputs of a driver, as well as how it moves along a track or road. It is commonly judged by how a vehicle performs particularly during cornering , acceleration, and braking as well as on the vehicle's directional stability when ...
Noise, vibration, and harshness (NVH), also known as noise and vibration (N&V), is the study and modification of the noise and vibration characteristics of vehicles, particularly cars and trucks. While noise and vibration can be readily measured, harshness is a subjective quality, and is measured either via jury evaluations, or with analytical ...
Operating a vehicle at a speed higher than the speed limit of a particular road. Speed limit The maximum (or minimum in some cases) speed at which road vehicles may travel legally on particular stretches of road. Spur route A highway that branches off of the mainline and goes to an area that is not served by the mainline highway.
The main mechanism responsible for generation of ground vibrations by moving cars and lorries is the dynamic forces associated with vehicle passage over road irregularities, such as bumps, peats, etc. These forces, and hence generated ground vibrations, can be reduced by keeping road surfaces in good condition.
A run-off-road collision with a tree in Kreis Pinneberg, Germany in 2010. A roadway departure [1] [2] (also called roadway excursion or run-off-road collision) is a type of incident that occurs when a vehicle leaves the roadway. Such incidents can lead to a single-vehicle collision.
Automotive aerodynamics is the study of the aerodynamics of road vehicles. Its main goals are reducing drag and wind noise, minimizing noise emission, and preventing undesired lift forces and other causes of aerodynamic instability at high speeds. Air is also considered a fluid in this case.