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Morning! Q1) I need to illustrate the difference between the "traditional" macrotexture offered by HRA or surface dressing and the "negative" texture offered by the more freely draining surface types such as SMA and/or proprietary thin surfaces BUT not illustrating the behaviour of the porous alphalts that have full depth draining (enrobes drainant?) for which I have already got a slide Does anyone have a graphic or can scan ( with reference) any diagram that would graphically illustate the mechanism that leads to these surfaces reducing spray, I already have photographs from Maurice Daines Report for TRL showing how Porous Asphalt cuts down spray so I don't need to illustate what it does but HOW IT DOES IT.. Can you point me to a URL FTP site or email the image (with references as required) to me... Q2) Anyone from Southampton University TRG on this list?...... Regards John ======================================= ROAD SURFACE CHARACTERISTICS AND SAFETY: A Project Jointly Funded by The AA FOUNDATION FOR ROAD SAFETY RESEARCH and CSS being undertaken by HAMPSHIRE COUNTY COUNCIL http://195.167.162.28/aafoundation/ http://www.cssnet.org.uk/ John C Bullas BSc MSc MIHT FGS - Research Officer - AA Foundation / CSS 3rd Floor, Partnership House, Moorside Road, Winchester Hampshire SO23 7RX. Telephone 01962 845029 / 873759 Fax 01962 878627 / 846999 MOB: +44 (0)7946 317 467 - EMAIL:[log in to unmask] ======================================