See this site:
Ravelinghttp://www.envirosnowmelt.com/blacktopsealer.htm

It explains all the different forms of asphalt disintegration, including raveling.
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Raveling is caused by the action of traffic on a weak surface. Raveling of a weak surface
course is generally due to insufficient binder in the mix. Raveling is different than
weathering, which is caused by climatic conditions that result in a drying out of the
pavement surface. “Coarse Ravel” is the wearing away of the pavement surface,
resulting in an extremely roughened surface texture. This rough surface texture is due to
the dislodging of coarse aggregate and loss of the asphalt binder. “Fine Ravel” is the
wearing away of the pavement surface asphalt and fines, resulting in a moderately
roughened surface texture. This roughened surface texture is due to the wearing away of
fine aggregate and asphalt binder. Coarse Ravel is characterized by an extremely rough
and pitted surface. Fine Ravel is characterized by a moderately rough surface.
Volgens mij is de deklaag van het asfalt aan het "rafelen". Dat wil zeggen dat de steentjes loslaten (weersinvloeden, met name vorst) door het verkeer wordt dat alleen maar erger. Is dus link, veel steenslag op de weg. Kijk dus uit op vluchtstroken!


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Note added at 1 hr 53 mins (2005-03-29 15:33:07 GMT)
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The three last lines (the lines in Dutch) come from the first website reference, which explains \'rafelen\' in Dutch. I should have inserted a space and made clear that it was a quote.