Measurement of International Roughness Index by Using <svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" style="vertical-align:-0.0pt;width:16.2875px;" id="M1" height="15.25" version="1.1" viewBox="0 0 16.2875 15.25" width="16.2875">
	
		
			<g transform="matrix(.022,-0,0,-.022,.062,15.187)"><path id="x1D44D" d="M698 636l-541 -596q60 -5 176 -5q91 0 138.5 5t69.5 24q44 36 85 124l29 -15q-38 -125 -64 -173h-559l-9 16l545 598h-182q-81 0 -109 -8t-48 -31q-26 -29 -55 -103l-29 3q23 86 42 200h22q11 -16 21 -20.5t34 -4.5h428z"></path></g>

		
	
</svg>-Axis Accelerometers and GPS

<table>Quarter-car vehicle model. (a) Vehicle representation; (b) simplified representation.</table>

Mathematical Problems in Engineering

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Figure 1

Figure 1: Measurement of International Roughness Index by Using <svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" style="vertical-align:-0.0pt;width:16.2875px;" id="M1" height="15.25" version="1.1" viewBox="0 0 16.2875 15.25" width="16.2875">
	
		
			<g transform="matrix(.022,-0,0,-.022,.062,15.187)"><path id="x1D44D" d="M698 636l-541 -596q60 -5 176 -5q91 0 138.5 5t69.5 24q44 36 85 124l29 -15q-38 -125 -64 -173h-559l-9 16l545 598h-182q-81 0 -109 -8t-48 -31q-26 -29 -55 -103l-29 3q23 86 42 200h22q11 -16 21 -20.5t34 -4.5h428z"></path></g>

		
	
</svg>-Axis Accelerometers and GPS 

Mathematical Problems in Engineering

Measurement of International Roughness Index by Using -Axis Accelerometers and GPS

Figure 1