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149ROUGHNESS INDEXDy.Ex. Engr.The Contractor shall be responsible to measure the roughness of road surfacefor which he may use the Roughness Index Testing Machine at his own cost. Use of“Towed Fifth Bump Integrator” shall be made to measure the roughness of the roadsurface. The calibration of the machine shall be done from time to time as and whenwarranted from reputed Institutions like C.R.R.I., New Delhi and their Certificate shallbe produced to that effect. The values of roughness so measured shall not exceedthe values given below for various types of road surfaces under standard conditions ofcarrying out the test and as specified below :1) S.D.B.C. : 2200 mm. / Km.2) Premix Carpet : 2500 mm. / Km.3) B.M. : 2500 mm. / Km.The Roughness Index test shall be carried out before start of the work and aftercompletion of Surface Course as directed by Engineer-in-charge for the work ofstrengthening and as directed.The results of Roughness Index test shall be made available to the Engineerin-chargewithin 5 days from the test so taken.As an outcome of roughness test, where the surface irregularity of wearingsurfaces falls outside the tolerances mentioned above, the Contractor shall be liable torectify the deficiencies in a manner as directed and to the satisfaction of the Engineerin-charge.If the contractor fails to carry out roughness index test, the same will be donedepartmentally and double the cost so incurred will be recovered from him.Signature of Contractor No. of corrections Executive Engineer