A method and system for simultaneously generating a global lane map and localizing a vehicle in the generated global lane map is provided. The system includes a plurality of image sensors adapted to operatively capture a 360-degree field of view image from the host vehicle for detecting a plurality of lane markings. The image sensors include a front long-range camera, a front mid-range camera, a right side mid-range camera, a left side mid-range camera, and a rear mid-range camera. A controller communicatively is coupled to the plurality of image sensors and includes a data base containing reference lane markings and a processor. The processor is configured to identify the plurality of lane markings by comparing the detected lane markings from the 360-degree field of view image to the reference lane markings from the data base and to fuse the identified lane markings into the global lane map.