Each parking meter shall he or she so constructed as to display, upon the deposit of appropriate coins in lawful money of the United States of America, a signal showing legal parking for the period of time commensurate with the combination of coins deposited in accordance with the schedule set forth by this chapter. Each parking meter shall be so constructed that, upon the expiration of the legal time limits, the meter will indicate by a proper visible signal that the legal parking period has expired. Instructions shall be displayed on each parking meter showing the legal parking time permitted by the insertion of proper coins, the maximum continuous legal parking time permitted for any vehicle, and the periods during which the parking meter time limits established by this Traffic Code are in force.