Abstract: An improved fender flap and improved side skirts are presented for suppressing spray and coalescing and directing water droplets thrown from rotating tires of vehicles via centrifugal forces, or formed over the tires by the impact of high velocity throw on flat surfaces over the wheels. They are primarily of value to wheeled vehicles, especially large commercial trucks or tractor-trailer combinations. The preferred embodiments herein disclosed are used as fender flap and side skirts, located respectively behind and beside the wheel.The fender flap has symmetric closely spaced apart wedges aligned vertically parallel to the planes of rotation of the tire and a base having slanted slots between the wedges that deflect the coalesced and condensed water toward the center of the fender flap behind the fender flap.

Abstract: A vehicle spray control system apparatus and method for suppressing spray and coalescing and directing water droplets thrown from rotating tires of vehicles via centrifugal forces comprises various embodiments of spray controllers adapted for selective locations on vehicles, such as large commercial trucks and tractor-trailer combinations. The preferred embodiments are used as: fender flap, between tractor-tandem, over-wheel, floor sill, and general purpose spray controllers, located where droplets impact at high velocity and side skirts to condense low-velocity mist and carry the water rearward. Embodiments have a receiving side and an opposite side and comprise a plurality of symmetric or asymmetric wedges which extend from the planar surface of and are integrally formed with a base. In respective embodiments, these wedges either touch or are closely spaced apart at the receiving side of an unperforated base, or a base having slots.