Disc parking which can make a one-hour parking zone as short as thirty minutes, possibly resulting in an unjustified parking ticket. On March 31, 1979 the conference of ministers of transportation in the European Union decided that a European standard should only use designs with a single clock face. The standardized clock disc was introduced as federal law in Germany in November 1981, and similar designs were adopted in other European countries. From 1998 the old parking disc designs began to be abolished. France set the last date to 2007, while in Switzerland (not an EU member) the EU parking disc design
Ticket machine of change when passengers use a higher ratio of $2 and 50c coins, depleting the ticket machine of smaller coin denominations (10c, 20c). Passengers do not need to buy tickets on trams when ticket machines run out of change. Ticket machines are often used in car parking, as well as those that issue free tickets — for example, those for virtual queueing. Mechanical ticket machines were used by bus drivers and conductors since the late 1920s. Their functions may include printing tickets, recording of sales and payments. Some manufacturers are TIM, Almex, Setright, AEG, CAMP (Compagnie d'Ateliers Mecaniques de Precision),