Finland's road system is utilized by most internal cargo and passenger traffic. The annual state operated road network expenditure of around €1 billion is paid for with vehicle and fuel taxes which amount to around €1.5 billion and €1 billion, respectively. Among the Finnish highways, the most significant and busiest main roads include the Turku Highway (E18), the Tampere Highway (E12), the Lahti Highway (E75), and the ring roads (Ring I and Ring III) of the Helsinki metropolitan area and the Tampere Ring Road of the Tampere urban area.