Low-Cost Portable Road Smoothness Testing Method Based on Pseudo-Vibration Velocity Range

Figure 9

Fitting graph of V Range and IRI when the vehicle is driving at a uniform speed of 60 km/hr: (a) unit 40 m, (b) unit 60 m, (c) unit 80 m, and (d) unit 100 m.

(a)

(b)

(c)

(d)