Wind Induced Vibration Analysis of Hat Sectioned Highway Sign Pole for Legibility

Abstract

Transportation authority always tries to improve the road safety. As the role of the road signs used by them is; to prove key information through warning, guiding and regulating the road riders, the highway sign poles are vital element of road transportation system. It consists of a sign board supported by hat sectioned beam. Their main function is; to assist the driver to drive the vehicles appropriately and safely. So they are designed for all season situations. A problem in traffic sign readability may leads to unsafe driving behaviors. Also any flaws in it lead to an accident possibility of the road vehicles. This paper deals with an effect of stormy winds that causes undue vibration and has a detrimental effect on drivers’ vision. A methodical approach is applied that includes vibration analysis of hat sectioned sign pole to ensure its frequency within safe limit specified by the concerned regulatory bodies. Numerical method is used to verify the obtained result.