Green streets

Storm water management and water conservation are common concerns for many communities in Washington and are connected with development of transportation infrastructure as well as new residential and commercial development. With the strong potential for additional development, cities have an opportunity to review codes and design standards and incorporate “Low-Impact Development” practices that will provide low cost options for managing storm water, as well as water conservation practices.

Drawing of a green street with trees and shrubs

New research conducted at both the national and state levels points to opportunities to reduce negative impacts of storm water using a combination of regional and site level techniques to prevent, treat, and storm water runoff and associated pollutants. Many of these practices use low-impact development methods, such as rain gardens, bio-retention areas, and grass swales. Others go further by changing site-design practices to maximize existing infrastructure by focusing development, reducing parking spaces, narrowing streets, and eliminating cul-de-sacs.

Contact: Community Planning and Development for assistance finding innovative solutions to your community's transportation challenges including assistance developing green streets.


Design Guides and Best Practice

Case Studies


More information:
Active Transportation Programs Manager