The Red Line, the winning Sign and Line proposal by Eric Arneson and Nahal Sohbati of Topophyla and Gabriel Castro-Andrade, is a site access strategy that uses clear boundaries, scalable protocols, and specific points of contact to manage entry into active jobsites. Inspired by global traditions of cloth as a signifier of protection, solidarity, and unity, the system specifies commonly available materials to establish a continuous perimeter line marked with red fabric, designated contact zones, standardized signage, and a single point of authority.

Topophyla is an analysis-driven, process-oriented landscape architecture practice serving Santa Barbara, Los Angeles, and the Bay Area, co-founded by Eric Arneson and Nahal Sohbati. Topophyla approaches each project through a holistic, site-specific lens, using careful analysis to shape landscapes that are ecologically responsive, contextually grounded, and experientially rich. Eric Arneson is a California-licensed landscape architect who incorporates advanced documentation tools, including aerial mapping and drone-based workflow, in the design and construction coordination process. Nahal Sohbati is a landscape designer whose work engages design as a tool for social and environmental advocacy. 

Gabriel Castro-Andrade is a designer and researcher examining how construction labor, safety systems, and material boundaries shape architectural form and civic life. His graduate research on detailing—tracking choreography, injury, and craft knowledge—as a shared language between designers and builders contributed to his recent work on The Red Line. Currently an exhibition designer at the Museum of Fine Arts, Boston, Castro-Andrade previously worked at Wilmotte & Associés in Paris, TEN Arquitectos in Mexico City, and as a cement mason in Newark, New Jersey.

Support

Sign and Line was made possible, in part, by the members of The Architectural League. This program was additionally supported by the New York State Council on the Arts with the support of the Office of the Governor and the New York State Legislature.