This intersection took about two years to widen, as it was part of the Memorial Drive widening project between 41st and 71st streets. The project began in 1974 and was not completed until March 1976. During construction, the intersection had the present green poles and signals with two, three-head signals and the present left-turn signal with a solid green light in place of the arrow. Upon completion of the project, the left-turn signal received an arrow, and the two other signals received straight green arrows. Another signal that was installed on the pole contained green and yellow right-turn arrows and a solid red light. The right-turn arrows corresponded with the left-turn signal as they do today. When the green-arrow conversion was made in 1979, the signals on the poles were eliminated, and the right signal on each mast arm was converted to the five-head signal presently in place. The left-turn signal remained unchanged. The intersection has four lanes on each approach with left- and right-turn lanes. The future signal conversion only will include the left-turn signal, as there are four right-turn lanes here. The intersection handles traffic well, even though Memorial Drive is one of Tulsa’s busiest streets. In the background at the top of the hill (the signals are visible) is 51st Street. Photo taken June 1982.