I-580 Castro Valley Redwood Road Interchange

Location: Castro Valley

Project Type:

Partners: Caltrans/ Alameda CTC


The objective of this highway interchange project was to reconfigure the existing on- and off-ramps to reduce congestion on Redwood Road and Castro Valley Boulevard. During the preliminary engineering phase, PGAdesign prepared four simulations that illustrated how the landscape design will improve upon the existing condition and help mitigate for the loss of three houses and mature trees. Once the environmental phase was complete, PGAdesign was charged with designing and preparing the planting and irrigation plans, specifications and estimates for the project. Part of the project involved removal of two existing off ramps which created two new areas of open space, where PGAdesign’s planting design created a natural appearing landscape. PGAdesign worked closely with the project engineers to select appropriate species for a large on-site storm water basin, and they were careful to avoid negative impacts to an adjacent creek.

Location: Castro Valley

Project Type: Transportation

The objective of this highway interchange project was to reconfigure the existing on- and off-ramps to reduce congestion on Redwood Road and Castro Valley Boulevard. During the preliminary engineering phase, PGAdesign prepared four simulations that illustrated how the landscape design will improve upon the existing condition and help mitigate for the loss of three houses and mature trees. Once the environmental phase was complete, PGAdesign was charged with designing and preparing the planting and irrigation plans, specifications and estimates for the project. Part of the project involved removal of two existing off ramps which created two new areas of open space, where PGAdesign’s planting design created a natural appearing landscape. PGAdesign worked closely with the project engineers to select appropriate species for a large on-site storm water basin, and they were careful to avoid negative impacts to an adjacent creek.

Scroll Up