The cost of the work to be shared by railroad companies and the State Highway Department provided for in any annual program, exclusive of the cost of the surface paving on roadways and the curbing, sidewalk paving and guardrails on approaches, which shall be constructed at the sole expense of the State, shall be borne and paid 5% by the railroad company or companies involved and 95% by the State.
N.J.S. § 48:12-70