subsea eastern section is being discussed as a future project. A bypass motorway for traffic between Northern and Southern Sweden, Förbifart Stockholm, is being built. The many islands and waterways make extensions of the road system both complicated and expensive, and new motorways are often built as systems of tunnels and bridges. Congestion charges Stockholm has a congestion pricing system, the Stockholm congestion tax, in use on a permanent basis since 1 August 2007, after having had a seven-month trial period in the first half of 2006. The City Centre is within the congestion tax zone. All the entrances and exits of this area have unmanned control points operating with automatic number plate recognition. All vehicles entering or exiting the congestion tax affected area, with a few exceptions, have to pay 10–20 SEK (1.09–2.18 EUR, 1.49–2.98 USD) depending on the time of day between 06:30 and 18:29. The maximum tax amount per vehicle per day is SEK 60 (EUR 6.53). Payment is done by various means within 14 days after one has passed one of the control points; one cannot pay at the control points. After the trial period was over, consultative referendums were held in Stockholm Municipality and several other municipalities in Stockholm County. The then-reigning government (Persson Cabinet) stated that they would only take into consideration the results of the referendum in Stockholm Municipality. The opposition parties (Alliance for Sweden) stated that if they were to form a cabinet after the general election—which was held the same day as the congestion tax referendums—they would take into consideration the referendums held in several of the other municipalities in Stockholm County as well. The results of the referendums were that the Stockholm Municipality voted for the congestion tax, while the other municipalities voted against it. The opposition parties won the general election and a few days before they formed government (Reinfeldt Cabinet) they announced that the congestion tax would be reintroduced in Stockholm, but that the revenue would go entirely to road construction in and around Stockholm. During the trial period and according to the agenda of the previous government the revenue went entirely to public transport. Ferries Stockholm has regular ferry lines to Helsinki and Turku in Finland (commonly called "Finlandsfärjan"); Mariehamn, Åland; Tallinn, Estonia; Riga, Latvia, and to Saint Petersburg in Russia. The large Stockholm archipelago is served by the archipelago boats of Waxholmsbolaget (owned and subsidized by