Continuous internal pedestrian walkways, no less than five feet in width, shall be provided from the public sidewalk or right-of-way to the principal customer entrance of all principal buildings on the site. At a minimum, walkways shall connect focal points of pedestrian activity such as, but not limited to, transit stops, street crossings and building and store entry points and shall feature adjoining landscaped areas no less than three feet in width that include trees, grass, shrubs, benches, flower beds, ground covers or other such materials for no less than 50% of their length.