Notwithstanding any other provision of this title, the driver of a vehicle shall exercise due care to avoid colliding with any pedestrian. Notwithstanding any other provision of this title, the driver of a vehicle shall, if necessary, warn any pedestrian by sounding the horn of the vehicle. Notwithstanding any other provision of this title, the driver of a vehicle shall exercise proper precaution on observing any child or any obviously confused or incapacitated individual.