I remembered a NCHRP synthesis by prof. Al-Qadi and Flintsch about winter maintenance evaluaiotion using friction measurement talked a little about taking photographs after tyres passing the wetted pavement. But it is not done on the observation station.
Hao Wang
Ph.D student
University of Illinoise at Urbaba-Champaign
---- Original message ----
>Date: Mon, 2 Apr 2007 16:10:32 +0200
>From: "Glaeser, Klaus-Peter" <[log in to unmask]>
>Subject: AW: ***DWD-CSG: SPAM*** Laboratories with under road facilities / Numerical momentary sound frequency distribution from WAV files
>To: [log in to unmask]
>
>John,
>I think every major tyre company has such a camera pit on their test ground.
>Regards
>Klaus-Peter Glaeser
>
>
>[log in to unmask]
>
>
>
>-----Ursprüngliche Nachricht-----
>Von: Technical, operational and economic aspects of road freight
>transportation [mailto:[log in to unmask]] Im Auftrag
>von John C Bullas - Lists A/C
>Gesendet: Montag, 2. April 2007 09:55
>An: [log in to unmask]
>Betreff: ***DWD-CSG: SPAM*** Laboratories with under road facilities /
>Numerical momentary sound frequency distribution from WAV files
>
>
>Are any forum members aware of any research establishments with active under
>road observation facilities to enable photographs to be taken
>of tyres passing over
>a transparent panel that can be wetted?
>
>Also have any forum members knowledge of open source software capable of
>generating a numerical momentary sound frequency distribution from
>WAV files
>
>Regards
>
>John C Bullas
>
>--
>
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