(1) It is the legislative purpose of the Council of the City of Philadelphia to improve mass transportation in the City and to enhance one of the most important shopping districts of the City of Philadelphia by limiting the use of Chestnut street from Eighth street to Eighteenth street and of the eastbound lane between Sixth street and Eighth street to approved mass transit vehicles and pedestrians. In order to assure that businesses on Chestnut street will have no difficulty in continuing to receive necessary deliveries and for the continuance of necessary maintenance, special provisions are made in this chapter to allow necessary but orderly use of the Transitway by delivery and maintenance vehicles. Every possible effort has been made to assure that the businesses along Chestnut street will not be adversely affected.