Patent ID: 8880333

Claim:
A computer-implemented method for calculating a green route, comprising: obtaining an origin and a destination associated with a road network; calculating, by a processor, at least one route from the origin to the destination using geographic data representing roads in the road network, wherein the geographic data includes effective slope data that represents a fuel consumption impact of a slope of a road; calculating fuel consumption of the calculated routes using the effective slope data to identify a route that minimizes fuel consumption when traveling from the origin to the destination; and providing route guidance for traveling on the route that minimizes fuel consumption, wherein the geographic data includes actual slope data for road segments representing a road in the road network, and further comprising calculating a general fuel consumption value for a segment associated with an actual slope value, wherein the general fuel consumption value is calculated using the formula: GFC=Σ(distance n *LPK(slope n ))/Σ(distance n ) where distance is a length of the segment, slope is the actual slope value of the segment, and LPK is a lookup table value.