Abstract: By providing an upstanding drag reducing baffle wherein the upper edge of said baffle comprises smoothly curved extension portions on both sides thereof, lying in substantially the same plane of the baffle, an improved wind deflector capable of increased drag reduction is achieved. In the preferred embodiment, these extension portions extend from the edge of the baffle toward the center and comprise at least half the distance from the edge to the mid-point of the baffle. Also, in the preferred embodiment, a front curved vortex stabilizer, a portion of which extends above the wind deflector, is used in combination with the wind deflector for additional drag reduction.