The project improves safety and traffic capacity between the Keaʻau Bypass Road and Shower Drive, a distance of approximately 2 miles.
Phase 1 involved converting the shoulder into a permanent travel lane. The increased roadway width also required the widening of Waipahoehoe Stream Bridge. Drainage improvements along the widened highway included lengthening and repair/replacement of existing culverts, and the installation of a new multiple pipe culvert across the highway to alleviate flooding conditions. Relocation of utility poles and easement or land acquisition was required. Relocation of utility poles and easement or land acquisition was also required.
Phase 2 involved installation of a new traffic signal at the intersection of Shower Drive to improve traffic flow and alleviate traffic back logs.
WOC also prepared and processed a State and NEPA Environmental Assessment, including addressing Section 106 consultation under the National Historic Preservation Act and Section 7 of the Endangered Species Act. A Traffic Assessment, Transportation Management Plan and Traffic Signal Warrant Study was also prepared.
Services Provided: Planning, Civil Engineering, Transportation & Traffic Engineering
