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REBUILDING CALIFORNIA - Senate Bill 1
Senate Bill 1, the Road Repair and Accountability Act
of 2017 invests $54 billion over the next decade
to fix roads, freeways and bridges.
See where the money is going at www.rebuildingca.ca.gov.
Rating Highway Conditions
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SB 1 Opportunities for Small and Diverse Businesses
Under SB 1, Caltrans will be increasing its outreach and training efforts
aimed at helping small businesses make connections and learn
how to navigate contracting with the State.
Low Impact Development (LID) design strategies can be successfully applied to main streets and parking lots to improve water quality for sustainable communities. A sustainable strategy to address water quality considers designing stormwater runoff systems that are integrated within the transportation system. Landscape Architects must work closely with their Project Development Teams (PDT) to identify opportunities to include LID into projects.
Biofiltration is one of Caltrans’ most cost-effective and most commonly used roadside stormwater treatment best management practice (BMP). In urbanized settings there often isn’t enough space for conventional biofiltration strips and swales. Instead, the best urban solutions are often biofiltration BMPs that have been adapted for main street and parking lot applications. LID techniques include sidewalk stormwater planters, sidewalk stormwater tree trenches, parking lot stormwater planters, and permeable paving. Though these BMPs are considered non-standard for Caltrans, they are appropriate for urbanized conditions because they provide stormwater treatment benefits in limited space and provide a desirable landscape.
These BMPs are composed of conventional landscape materials familiar to Landscape Architects. Soil, plants, and gravel are combined to create small-scale stormwater treatment devices that mimic natural processes. These BMPs are very effective in treating runoff from “first flush” storms. A series of connected small-scale LID solutions provide treatment comparable to stand-alone biofiltration strips and swales, removing pollutants primarily by filtration through plants, infiltration through the soil, and evapotranspiration. Infiltrating stomwater runoff volume and treating it near its source can reduce or replace conventional stormwater conveyance systems (e.g. drain inlets and underground pipes).
Successful LID techniques can be seamlessly integrated in multi-modal transportation environments, providing communities with sustainable streets and parking lots that benefit everyone.
Updated June 28, 2018
Planning & Design
Improve Soil Health
Improve Soil Health & Provide Cover
Long Term Cover
Steep Slope Techniques
Low Impact Development