in Kerala has been growing at a rate of 10–11% every year, resulting in high traffic and pressure on the roads. Total road length in Kerala increased by 5% between 2003 and 2004. The road density in Kerala is nearly four times the national average, and is a reflection of Kerala's unique settlement patterns. India's national highway network includes a Kerala-wide total of 1,524 km, which is only 2.6% of the national total. There are eight designated national highways in the state. Upgrading and maintenance of 1,600 km of state highways and major district roads have been taken up under the Kerala State Transport Project (KSTP), which includes the GIS-based Road Information and Management Project (RIMS). The Kerala Infrastructure Investment Fund Board is a government owned financial institution in the state to mobilize funds for infrastructure development from outside the state revenue, aiming at overall infrastructure development of the state. Energy Renewable energy sources constitute the bulk of electricity generated in Kerala. KSEB Ltd has 31 hydro-electric projects, 11 solar projects, 2 diesel power plants & 7 wind farms.Power generation is also undertaken by Captive Mode Projects, Independent Power Mode Projects & Co-generation mode projects other than KSEBL. Oil refining and petrochemicals The Kochi Refinery is a public crude oil refinery in the city of Kochi. It is the largest state owned refinery in India with a production capacity of 15.5 million tons per annum. Formerly known as Cochin Refineries Limited and later renamed as Kochi Refineries Limited, it was acquired by Bharat Petroleum Corporation Limited in the year 2006. Today Kochi Refinery is a frontline entity as the unit of the Fortune 500 company, BPCL. With a turnover of around US$2500 million, the refinery aims to strengthen its presence in refining and marketing of petroleum products and further grow into the energy and petrochemical sectors. Kochi Refinery is engaged in Refining and marketing of petroleum products. Beginning with a capacity of 50,000 barrels per day, today the Refinery has a refining capacity of 310,000 bbl/d. The Company entered the petrochemical sector with benzene and toluene in 1989. Solar power India's largest floating solar power plant set up on the Banasura Sagar reservoir in Wayanad, Kerala. It is the 500 kWp (kilowatt peak) solar plant of the Kerala state electricity board (KSEB) floats on 1.25 acres of water surface of the reservoir. India's first solar ferry used for public transport,