A system, device, and methods for autonomous navigation using intensity-based localization. One example computer-implemented method includes receiving data including a plurality of intensity values from one or more sensors disposed on a vehicle as the vehicle traverses a route and generating a first group of intensity values wherein the first group includes at least some of the plurality of intensity values received. The method further includes removing the intensity values below an adaptive threshold from the first group of intensity values to generate a second group of intensity values, comparing the second group of intensity values to an intensity map, and generating a localized vehicle position based on the comparison between the second group of intensity values and the intensity map.