Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:10:p12
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 10 (pt 12/32)
Character Range: 1302444–1305451

3.2.4.1.1.1. Mass of an individual vehicle
              The test masses of vehicles HM and LM selected according to paragraph 4.2.1.4. of Annex B4 shall be used as input.
              TMind, in kg, shall be the test mass of the individual vehicle according to the definition of test mass in paragraph 3.2.25. of this Regulation.
              If the same test mass is used for vehicles LM and HM, the value of TMind shall be set to the mass of vehicle HM for the road load matrix family method.
              3.2.4.1.1.2. Rolling resistance of an individual vehicle
              3.2.4.1.1.2.1. The RRC values for vehicle LM , RRLM, and vehicle HM, RRHM, selected under paragraph 4.2.1.4. of Annex B4, shall be used as input.
              If the tyres on the front and rear axles of vehicle LM or HM have different rolling resistance values, the weighted mean of the rolling resistances shall be calculated using the equation in paragraph 3.2.4.1.1.2.3. of this annex.
              3.2.4.1.1.2.2. For the tyres fitted to an individual vehicle, the value of the rolling resistance coefficient RRind shall be set to the RRC value of the applicable tyre energy efficiency class according to Table A4/2 of Annex B4.
              In the case where individual vehicles can be supplied with a complete set of standard wheels and tyres and in addition a complete set of snow tyres (marked with 3 Peaked Mountain and Snowflake – 3PMS) with or without wheels, the additional wheels/tyres shall not be considered as optional equipment.
              If the tyres on the front and the rear axles belong to different energy efficiency classes, the weighted mean shall be used and shall be calculated using the equation in paragraph 3.2.4.1.1.2.3. of this annex.
              If the same rolling resistance is used for vehicles LM and HM, the value of shall be set to for the road load matrix family method.
              3.2.4.1.1.2.3. Calculating the weighed mean of the rolling resistances
where:
                             represents vehicle L, H or an individual vehicle;
                             and RRHM,FA are the actual RRCs of the front axle tyres on vehicles L and H respectively, kg/tonne;
                             is the RRC value of the applicable tyre energy efficiency class according to Table A4/2 of Annex B4 of the front axle tyres on the individual vehicle, kg/tonne;
                            RRLM,RA, and RRHM,RA are the actual rolling resistance coefficients of the rear axle tyres on vehicles L and H respectively, kg/tonne;
                            RRind,RA  is the RRC value of the applicable tyre energy efficiency class according to Table A4/2 of Annex B4 of the rear axle tyres on the individual vehicle, kg/tonne;
                             is the proportion of the vehicle mass in running order on the front axle.
              RRx shall not be rounded or categorised to tyre energy efficiency classes.
              3.2.4.1.1.3. Frontal area of an individual vehicle