The EU parking disc regulation was skipped in France for a long time where a general time limit of 1 hour 30 was the only regulation in effect. The EU parking disc however allows a much wider range of parking regulations which were tested first in Bron at the beginning of January 2001 when a new tramway line reached the city center. The Franklin Roosevelt Avenue was switched to a maximum of 30 minutes at the time that would a require a different clock disc. Finally the EU parking disc was officially introduced into the road statutory on 19 October 2007. On 6 December 2007 the Ministre de l'Intérieur implemented a regulation on a parking disc that would only have one window to show the arrival time. This new parking disc differs somewhat from the EU parking disc - it is colored in brown tone (EU disc is blue), it is square with 150 mm on each side (EU disc is rectangular) and the marks on the clock face are set in intervals of ten minutes. Many cities in Switzerland borrowed the blue zone concept in the same way as in France with a maximum time of 1 h 30. In cities like Basel the blue zones meant that parking lots were marked with blue lines where the scheme would be effective while other (non blue) parking lots were free. No other signposting was used in these blue zones to mark the controlled space - instead the parking discs showed the regulations on the back side. A later development in Switzerland was the introduction of red zones allowing for a maximum of 15 hours. This scheme required another parking disc that would allow for 24 hours to be shown. The EU parking disc design was introduced in 2000 and the old designs abolished in 2003. This gave rise to some confusion among car drivers since the old parking regulations denoted "1:30 h" of maximum parking time while the new parking regulations imposed a limit of "1 hour". Since this time is rounded up to the next half of an hour there was no real difference however. The blue zone parking lots were kept however in the same way as before so that the new disc parking scheme reads as follows:  This regulation is not mandatory on Sundays and national holidays. Effectively the actual legal parking time in the blue zone differs widely - arriving at 11:30 allows for legal parking up to 14:30 (about 3 hours) and arriving on Saturday at 17:31 allows for parking up to Monday 08:00 (more than 38 hours)  The Blue Zone parking regulations are effective continuously i.e. they are not restricted to the time span of the arrival time - a parking disc must always be used when parking a car in the Blue Zone (unlike in other countries where a parking disc does not need to be used outside the indicated times).