A 29-year-old woman was killed early this morning in a three-vehicle collision near the 900 block of Highway 75 in Conroe, according to the Conroe Police Department. Mariah Lee Manke, 29, was pronounced dead after her Ford Windstar van was struck by a Chevrolet Lumina that had apparently disregarded a red light at the intersection of South Frazier and Gladstell.