Driver assistance methods and devices for a host vehicle

A driver assistance method, comprising:

• storing a trip, wherein the trip has n traffic lights along a route from a starting point to an end point and the trip is divided into n+1 sections by the n traffic lights, wherein n is an integer greater than or equal to 1, wherein the intersection where the i-th traffic light is located has at least one i-th intersection reference object, and i is any integer from 1 to n, and wherein storing the trip comprises only acquiring and storing position information of the 1st to n-th intersection reference objects at the 1st to n-th intersections, travel length information of the n+1 sections, and driving path information of the host vehicle at the 1st to n-th intersections, and further wherein the i-th intersection reference object serves as both the end point of the i-th section and the starting point of the i+1-th section of the trip and is used to correct accumulated positioning errors and the driving path information at the intersection includes driving path guidance information with going straight or turning information and the driving path guidance information is used to connect the road network information of the two intersections.