Background
What is CSS?
Context Sensitive Solutions (CSS) is a collaborative approach to planning and delivering transportation projects that considers the surrounding community, environment, and overall quality of life. It emphasizes flexibility, stakeholder engagement, and the integration of transportation goals with broader community values. CSS aims to create transportation systems that are not only functional and safe but also support local character and environmental sustainability.
The concept originated in 1998 with the Thinking Beyond the Pavement conference, which introduced the foundational ideas under the term Context Sensitive Design (CSD). Early implementation revealed that decisions made during long-range planning significantly influenced later design and construction phases. Agencies also recognized the importance of aligning design with construction, operations, and maintenance to ensure consistent service throughout a project’s lifecycle. These insights highlighted the interconnected and multidisciplinary nature of the approach, prompting a shift from CSD to Context Sensitive Solutions. This evolution reflected a broader application of the principles—extending beyond design to encompass all phases of transportation program delivery, including planning, programming, environmental review, right-of-way, construction, and ongoing operations and maintenance.
In recognition of the evolution of CSD to CSS, AASHTO and FHWA refined the 1998 CSD definition, principles, qualities, and characteristics. This refinement is continuing as part of an ongoing effort. FHWA and AASHTO have collaboratively defined CSS as: