DRIVER ASSISTANCE APPARATUS FOR VEHICLE

A driver assistance apparatus for a vehicle includes a determiner, an estimator, a detector, and a deceleration rate setter. The determiner determines whether the vehicle is slipping in vehicle speed control involving acceleration or deceleration of the vehicle. The estimator estimates a road surface frictional coefficient at a location where the vehicle starts slipping as a first road surface frictional coefficient. The detector detects a high frictional coefficient area that has a second road surface frictional coefficient higher than the first road surface frictional coefficient and is located in front of the vehicle. The deceleration rate setter sets, in the vehicle speed control involving the deceleration, a target deceleration rate to be used when the vehicle travels in the high frictional coefficient area to a higher value than the target deceleration rate set for the first road surface frictional coefficient.