ESTIMATION APPARATUS AND VEHICLE

An estimation apparatus performs non-contact estimation of a friction coefficient of a road surface. The estimation apparatus includes at least one processor. The processor determines a state of the road surface and determine which of preset road-surface states the state of the road surface belongs to. The processor performs primary identification of a first range of a friction coefficient corresponding to the determined road-surface state on the basis of friction coefficient information and the determined state of the road surface. The friction coefficient information is sectioned for each of the road-surface states. The processor narrows down a range of the friction coefficient from the first range to a second range on the basis of the identified first range of the friction coefficient, and thereby perform secondary identification of the friction coefficient of the road surface. The second range is narrower than the first range.