Abstract: A self-propelled power roller screed having two generally parallel tubular screed tubes and powered winching means that cooperatively engage winching cables attached to deadman structures to advance the roller screed. Screed tube power means spin each of the screed tubes in a direction opposite a direction of travel of the roller screed to provide a generally smooth finish to the surface of the concrete and to push excess concrete forward as the screed moves along the forms. The winching means is a worm gear dual drum winch powered by a variable speed reversible power drill. A cable sheave is translated along a channel in the frame of the roller screed to effectively lengthen or shorten one of the winching cables to advance one end of the frame faster or slower than the second end of the frame, facilitating movement of the roller screed around curved portions of concrete paving and allowing for angular adjustment of the roller screed for differences that might exist in the winching cables and winching means.