Acoustical classification and conformity checking of road surfaces

1
Acoustical classification and conformity checking
of road surfaces

• - Experience and views for national roador
  environment administrations

2
Content

• Introduction
• Variance of PA
• New Construction Guidelines for PA
• SILVIA-Method
• Conclusion

3
Introduction

• For the noise from vehicles and tires there are
  existing limits and type-approval certification
  requirements.
• For the noise from road surfaces there are no
  special limits existing and until now no
  type-approval certification requirements.
• Type approval of road surfaces is a discussion
  point in Germany.

4
Variance of PA

• PA in Germany has a big noise reduction potential
  up to more than 10 dB(A).
• Unfortunately the spread in production of PA is
  also high.
• Therefore until now the noise reduction measure
  is limited to only 5 dB(A).
• What are the reasons for that and how can we
  overcome this problem?

5
Variance of PA
6
Variance of PA
7
Variance of PA
8
Variance of PA
9
New Construction Guidelines for PA

• The best way to get better surfaces is to build
  better surfaces.
• Material properties and construction procedures
  has to be enhanced.
• Especially the variance of material properties
  and in construction methods should be limited
  more than it is nowadays.
• PA will play a roll in new guidelines and
  hopefully can build in with less spread in future
  to make use of the existing potential of an extra
  noise reduction.

10
SILVIA-Method

• It is planned to make use of the SILVIA-method in
  Germany (LABEL 1 and 2).
• Especially for optimised PA the Type Approval
  and Conformity of Production methods of SILVIA
  will be used to hopefully establish an improved
  noise level for PA.
• A research program is planned for two years and
  shall start soon.

11
Conclusion

• The acoustical quality of road surfaces should be
  improved.
• In special cases (PA with big variance) the
  SILVIA-procedures could be helpful.
• The SILVIA-procedure are needed to be tested in
  practise.

12
Thank you ...

• ... for listening.

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