Perhaps this will work.

"Dynamic cleaning ability ensures superior restoration of carpets, especially in heavily soiled traffic areas."
http://www.masterblend.net/shopping/catalog.cfm?nextstart=11


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Note added at 42 mins (2007-10-29 17:50:25 GMT)
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You may want to leave out the word "heavily." If you use "soiled traffic areas," there is no need to add an explanation in parentheses such as the one for "Gestrasse" in the German text.

Here's a detailed description of how traffic areas become soiled:

"Tracked-in soil normally represents 80% or more of the soil deposited on carpets at entry points (that is why an effective matting system should be used.) Typically, soiling results from shoe soles that track dirt in from the street, parking garages, etc. and deposit it on a clean carpet until the carpet becomes as soiled as the shoe sole. Once this happens, the carpet and shoe sole transfer dirt back and forth, resulting in the dirt being carried to areas of the carpet that are not as soiled as the shoe sole. This is how ***soiled traffic areas*** develop and dirt is spread throughout a building."
http://64.233.183.104/search?q=cache:BUVAxqpu2XkJ:www.enviro...


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Note added at 43 mins (2007-10-29 17:51:38 GMT)
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Oops - it should be "Gehstrasse"