2019-02-082019-02-081977-1FHWA-OKOklahoma Department of Transportation State Planning and Researchhttps://hdl.handle.net/11244/317197This progress report surnmarizes the work done on the project from its inception to the present time. The project has been divided into four sections: conductive layer, reference electrode, long-term current, and corrosion rate measurement. Each of these areas will be discussed below.17 pages5,491,220 bytesapplication.pdfTechnical Report