At the start of the 1960s, it was determined that the Circus needed to be redeveloped to allow for greater traffic flow. In 1962, Lord Holford presented a plan which would have created a "double-decker" Piccadilly Circus; the upper deck would have been an elevated pedestrian concourse linking the buildings around the perimeter of the Circus, with the lower deck being solely for traffic, most of the ground-level pedestrian areas having been removed to allow for greater vehicle flow. This concept was kept alive throughout the rest of the 1960s. A final scheme in 1972 proposed three octagonal towers (the highest tall) to replace the Trocadero, the Criterion and the "Monico" buildings. The plans were permanently rejected by Sir Keith Joseph and Ernest Marples; the key reason given was that Holford's scheme only allowed for a 20% increase in traffic, and the Government required 50%.