The Trickle-Down Effect

This article describes a pilot project begun in Chicago, Illinois to renovate five of the city's 1,900 alleys employing “green” techniques instead of solely using a simple overlay. The $900,000 project was initiated in order to curb a number of resident's complaints that, during periods of intense rainfall or prolonged rainfall, abutting alleys are flooded and, in turn, flood residential basements. The roadway material employed is topped with a permeable pavement of asphalt, pavers, or concrete. Beneath this layer is a high-albedo concrete in which is sometimes embedded inlet structures or stormwater infiltration trenches. Below the albedo course lies about 1 foot of crushed gravel. The Chicago Department of Transportation (CDOT) has reported that responses to the improvements has been positive, and they plan to repave more alleys using this process in the future.


  • English

Media Info

  • Media Type: Print
  • Features: Illustrations; Photos;
  • Pagination: pp 36-39
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01050257
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Files: BTRIS, TRIS
  • Created Date: May 25 2007 7:49PM