California Department of Transportation


In 2008-2010 the Landscape Architecture Program sponsored a series of webinars focused upon applying recent roadside related Landscape Architecture research to real-world Caltrans projects. Benefits included project cost savings, improved project delivery, and reductions in climate change impact.

Erosion Control and Planting

Optimizing Soil Compaction

Optimizing Soil Compaction

Presented July 23, 2009

Presented by Donald H. Gray, former professor of Civil and Environmental Engineering at University of Michigan, and Monica Finn, Caltrans Biologist. This presentation explores the question: Can soil be compacted in a manner that serves both engineering requirements and plant growth needs?

Slope Stabilization Read the book: Biotechnical and Soil Bioengineering Slope Stabilization: A Practical Guide for Erosion Control - Donald H. Gray & Robin Sotir.


Soil Based Revegetation and Erosion Control

Advances in Soil-Based Revegetation and Erosion Control

Presented June 25, 2009

Presented by Michael Hogan, Soil Scientist with Integrated Environmental Restoration Services. This presentation outlines a systematic, soil-based approach to maintaining water quality.

Sediment Source Control Handbook Free Publication - Sediment Source Control Handbook.
Landform Grading

Soil Structure and Soil Health

Presented May 28, 2009

Presented by Vic Claassen. This presentation discusses the importance of soil structure in sustaining healthy vegetation and maintaining stormwater quality.


Landform Grading

Landform/Geomorphic Grading

Presented April 21, 2009

Presented by Horst Schor and Donald H. Gray. This presentation identifies the benefits provided by manmade land forms designed to mimic those found in the natural environment.



Successful Application of Biofiltration

Presented June 25, 2008

Presented by Dennis Cadd, Doug Brown, Greg Balzer and Jack Broadbent this presentation identifies the benefits of biostrips and bioswales, quantifies the stormwater pollution prevention benefits presented by roadside vegetation, and provides guidance for biofiltration vegetation.

Topsoil Webinar

Management of Topsoil Stockpiles for Use in Native Re-vegetation

Presented February 23, 2008

Dr. Keith Vogelsang of Indiana University presents research on the benefits of stripping, stockpiling, and reapplying topsoil. This presentation also includes information on proper methods to stockpile soil and the benefits of mycorrhiza in establishing effective, sustainable long-term vegetation.

Lean Green Highways Webinar

Lean Green Highways

Presented December 11, 2008

Learn the benefits presented by low impact development treatments to manage stormwater runoff, including cost savings, improved aesthetics, public stakeholder support, and satisfaction of permit requirements. Tools discussed include biofiltration strips and swales, willow pole planting, brush layering, and compost blankets. Presented by Greg Balzer & Pete Riegelhuth.

Vegetation Attacks Erosion Webinar

Vegetation Attacks Erosion

Presented December 4, 2008

The webinar explores the benefits of using traditional highway roadside planting design concepts to control erosion and manage stormwater runoff quality. Presented by Dr. Brent Hallock, Cal Poly San Luis Obispo.

Native Grass Sod Webinar

Native Grass Sod

Presented November 13, 2008

Native grass sod has shown promise as an effective method to control erosion. Unlike traditional seeded approaches, native grass sod provides 100% immediate soil protection. Doug Brown, Senior Landscape Architect at Caltrans presents research performed by Montana State University and the Western Transportation Institute. Included are methods to successfully grow and plant native grass sod. Common design concerns are addressed, including availability, cost, identifying appropriate species, and the best time and place to specify the use of native grass sod.