Method of estimating a propulsion-related operating parameter

The present invention relates to a method of estimating a propulsion related operating parameter of a vehicle (1) for a road segment, the method comprising the steps of: - estimating at least a first operating parameter of the vehicle (1) for the road segment based on information provided for the road segment; - estimating the propulsion related operating parameter for the road segment on the basis of said first operating parameter, the estimation taking into account at least one vehicle specific parameter, wherein said at least one vehicle specific parameter is determined by - acquiring driving data for at least two vehicle operating parameters while the vehicle (1) is in operation; - providing a predetermined relationship between the at least two vehicle operating parameters, the relationship taking said at least one vehicle specific parameter into account; and - determining said at least one vehicle specific parameter from said driving data for the at least two vehicle operating parameters and said relationship.