Analytical compact form models for the signal transient and crosstalk noise of two-coupled RLC lines are developed. Capacitive and inductive coupling effects are investigated and formulated in terms with eigen modes (i.e., even mode and odd mode). The signal transients and crosstalk noise expressions of two coupled lines are derived by using a wave-form approximation technique for the modal signals. It is shown that the models have excellent agreement with SPICE simulation.