The principle behind Street Creeks is to emulate natural hydrological and ecological systems in urban environments, using a distributed, de-centralized network of curbside channels and water-cleaning bioswales that treat the "first flush" of polluted surface runoff, and allow the remaining cleaner water to rainfall continue downhill.
Curb extensions forming a "gateway" at the mouth of an intersection in the NATCO Urban Street Design Guide. Click on image for details, and visit the Slow Ottawa 'Streets for Everyone' Pinterest board for more of these superb illustrations.
Bikeways and storm water management from Mass DOT's Separated Bike Lane Guide. Click image for link to full guide and visit the slowottawa.ca boards >> http://www.pinterest.com/slowottawa