CDOT SUSTAINABLE INFRASTRUCTURE REVIEW Worn Jerabek Architects is conducting a review of the Chicago Department of Transportation's practices and policies with the goal of highlighting and recommending effective strategies for bringing sustainability to Chicago's transportation infrastructure. Highlights: Green Alleys reduce the amount of stormwater runoff by increasing the amount of pervious surface area in the city. Rooftop Gardens help to reduce the "Urban Heat Island Effect" and lower energy usage. Traffic Calming Techniques lower the speed and quantity of traffic and enhance the character of residential streets. Efficient Lighting Strategies reduce light pollution and lower energy costs. Structural Soils allow planting to be designed to be multifunctional, incorporating detention, retention, filtration, or runoff use for rainwater.