Road Oil Posted on 18th December 20159th May 2021 by ThePD (The Project Definition) Road Oil is any heavy petroleum oil, including residual asphaltic oil used on roads to lay the dust and act as a waterproof binder. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Substance and tagged oil, refinery. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.