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Proposal for Interim Amendment R51.02 for Faster Implementation of Stringent Limits

This proposal suggests amending R51.02 to address the slow improvement of noise limits. It highlights the need for a quicker transition to R51.03 and presents the benefits and technical feasibility of amending the current method. The recommendation includes adopting technical improvements from R51.03 in R51.02.

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Proposal for Interim Amendment R51.02 for Faster Implementation of Stringent Limits

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  1. Informal document No. GRB-42-13 (42nd GRB, 5 – 7 September 2005 agenda item 1.2.1.) Proposal for interim amendement of R51.02 Awaiting the development and transition period of R51.03 proposal interim amendment R51.02

  2. Why an interim amendment R51.02 • It took a long time: • R51.02: Last tightening in 1995 • It will take a long time: • R51.03 + tightening of limits in 2015/2020 • Decision making on new method • Legislating process • Transition period with comparable limits • More stringent limits into force • For the Netherlands this takes too long • Effectively 20-25 years too slow improvement • In the past 2 a 3 dB reduction every 8 years • Consequences in Health and Costs proposal interim amendment R51.02

  3. -1,5 dB(A) -3 dB(A) • Ref: OICA Presentation GRB Inf Grp - Rome 2005 (=> paper Steven sept 2000) proposal interim amendment R51.02

  4. Effect of R51.03: stages converted in to time proposal interim amendment R51.02

  5. Additional effect ofR51.02 interim amendment proposal interim amendment R51.02

  6. Conclusions • Amending current method is effective in real traffic • Benefit/cost ratio of amending current method >> 1 (ref C4S study; UK GRBIG Granada) • Technical solutions are currently available • Introduction on short term seems to be feasible • Netherlands position: Amendment of R51.02 is a good interim solution, awaiting the introduction and first tightening of R51.03 proposal interim amendment R51.02

  7. Recommendation: • Test method remains unchanged • Limit table remains unchanged • Adopt the technical improvements of 51.03 and thus amend R51.02 on the following points • rounding and interpretation of measured values as proposed in R51.03 • measuring procedure absorption-coefficient as proposed in R51.03 • deletion of 1 dB subtraction for measuring uncertainty as proposed in R51.03 • deletion of DI diesel limit increase as proposed in R51.03 • definition of sports cars as proposed in R51.03 • definition of 4WD as proposed in R51.03 • perform test on tires as proposed in R51.03 proposal interim amendment R51.02

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