Crosstalk noise dominates in deep submicron VLSI design as interconnects are more closely placed over a small layout area. Signal response and signal integrity is largely affected by crosstalk delay and noise. In this paper, we propose a coupled line delay model for on-chip interconnects during global routing, with crosstalk between wires as the parameter to be optimized. Our proposed model is influenced by moment matching model of a transmission line. We propose an algorithm for crosstalk aware delay tree construction, optimizing the effect of crosstalk delay in the tree structure by employing a cut − and − join strategy. Experiments are done on some benchmark instances, and for varying technology parameters. Simulation results obtained are quite encouraging.