Final Project Manual.pdf

This Final Project Manual is prepared by the Washington State Department of Transportation (WSDOT) for the Systemic Horizontal Curves Improvements project on East Valley Highway and 142nd Ave East. The project encompasses safety enhancements including installation of Beam Guardrail Type 31 and Non-Flared Terminal Type 31, sinusoidal rumble strips, centerline and edge line profiled striping, and one dynamic speed sign. Additional work includes adjustment to existing pavement markings to enhance safety aspects and lane configuration. The manual serves as the comprehensive guide for project execution, detailing specifications, standards, and procedural requirements that contractors must follow throughout the project duration.

The manual establishes the technical and operational framework governing all project activities, materials, and quality standards. It provides detailed specifications for guardrail installation, rumble strip placement, striping applications, and signage deployment, ensuring compliance with WSDOT standards and safety requirements. The document outlines inspection procedures, workmanship standards, and quality assurance measures required throughout project completion. Contractors must adhere to all specifications contained within the manual to ensure the project meets safety objectives and performance criteria established by WSDOT for this systemic horizontal curves improvement initiative.