As our road networks become more crowded, the use of tunnels and underpasses is expanding, both to improve traffic flow, and to protect local environments from increased traffic exposure. within tunnels, where maintenance access can be limited, and where corrosive atmospheric conditions are common, reliable performance of the lighting system is critical, as is the need for the absolute minimum of operational maintenance requirements. so as with increasing tunnel the problem associated with lighting, ventilation and in case of emergency evacuation procedure is not been evolved. our basic aim is to solve above problem, by integrating all lighting, ventilation system with programmable logic control (plc) so that intensity and ventilation of the system can be controlled according to requirement and whole system is monitored through supervisory control and data acquisition (scada) system.