NE 28th Avenue was a substandard collector street in Hillsboro, OR, that had only two travel lanes and no bicycle lanes, sidewalks, or storm infrastructure. The corridor was the single crossing point of the TriMet Light-Rail line, connecting residential neighborhoods to the south with shopping centers and restaurants to the north. The challenge was to widen the corridor within a developed community, matching the fabric of the neighborhood.
Kittelson provided roadway design, signal design, traffic control plans, storm drainage conveyance and water quality design, landscape design, survey, geotechnical design, Level 1 hazardous materials assessment, and specifications and construction cost estimates. To aid in community engagement and the right-of-way process, we created 3D renderings of the improvements, which allowed us to convey clearly how public input was incorporated into the design as well as display precise images of the designed project.
Early in the design process, conflicts with Portland General Electric (PGE) and Frontier Communications were identified. Our team learned the design needs of PGE and designed the storm and waterline improvements so that the contractor and PGE could work cohesively during road closures. The Frontier Communications conflict required minor changes, including a fiber-optic duct bank to be lowered.
3D Brings an Unbuilt Complete Street Alive
Because of this utility coordination, construction was completed on schedule. The NE 28th Avenue improvements created a safe and efficient multimodal complete street from Main Street to Cornell Road through a residential neighborhood into the commercial district. The improvement provides a continuous pedestrian and bicycle route; Americans with Disabilities Act (ADA) access to communities, businesses, and parks; and a full stormwater collection, conveyance, and treatment system.