Page 10 - UNIT 5- FLEXIBLE PAVEMENT DESIGN

Civil Engineering Department | DCC3113 : Highway & Traffic Engineering

Failure criteria

• Two failure mechanisms are permanent deformation and cracking of the bituminous
layers.

• The definition from Croney, failure as transformation shape or deflection of 20mm tire’s

lane not speeding that measuring from ground level.

Slow zone Fast zone

Vertical
Deformation
or
Rutting

Figure 7-1 : A Typical Profile of a Road Cross Section Showing Rutting Along the Wheel Path

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Prepared by : SITI ZURAIFA BINTI MD SAH, zuraifa@pmu.edu.my