A speed control method and device. A speed bump is optically simulated on a roadway as by painting the roadway to create the appearance of a real speed bump, or an actual speed bump is visually enhanced to appear larger than it actually is. Actual speed bumps can be randomly interspersed among simulated speed bumps along a roadway.

 
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< Optical transmission module

< Multicore optical fiber connector for enhancing uniformity of amount of incident light and optical sensor array using the same

> Smart recognition apparatus and method

> Chemoenzymatic process for stereoselective preparation of R and S enatiomers of 2-hydroxy-3-(2-thienyl) propanenitrile
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