In this paper, safety based smart car parking guidance system has been designed and implemented using global system for mobile communications (GSM) technology and zigbee technology. It assists the drivers to overcome parking problems that usually occur in the urban areas, like time being wasted in looking for an available parking lot and keep on circling until they find a vacant parking spot. This system includes three modules: First, monitoring module; the drivers check on their mobile phones for an available parking spot in real time before arriving using short message service (SMS) without having to go online. Second, guidance module; an approach was suggested to determine the nearest vacant parking spots within the parking lot. This approach depends on the location of the vacant parking spot to the parking lot entrance, exite and pedestrian exit location. Third, safety module; the aim of designing this module is to provide a real time system capable of monitoring sudden events in the parking lot. In case of any emergency, the drivers will be alerted automatically through SMS.