at the top of its list of 31 places to visit. S&P Dow Jones Indices classifies Sri Lanka as a frontier market as of 2018. Sri Lanka ranks well above other South Asian countries in the Human Development Index (HDI) with an index of 0.750. By 2016, the country's debt soared as it was developing its infrastructure to the point of near bankruptcy which required a bailout from the International Monetary Fund (IMF). The IMF had agreed to provide a US$1.5 billion bailout loan in April 2016 after Sri Lanka provided a set of criteria intended to improve its economy. By the fourth quarter of 2016, the debt was estimated to be $64.9 billion. Additional debt had been incurred in the past by state-owned organisations and this was said to be at least $9.5 billion. Since early 2015, domestic debt increased by 12% and external debt by 25%. In November 2016, the IMF reported that the initial disbursement was larger than US$150 million originally planned, a full US$162.6 million (SDR 119.894 million). The agency's evaluation for the first tranche was cautiously optimistic about the future. Under the program, the Sri Lankan government implemented a new Inland Revenue Act and an automatic fuel pricing formula which was noted by the IMF in its fourth review. In 2018 China agreed to bail out Sri Lanka with a loan of $1.25 billion to deal with foreign debt repayment spikes in 2019 to 2021. In September 2021, Sri Lanka declared a major economic crisis. The Chief of its Central Bank has stepped down amid the crisis. The Parliament has declared emergency regulations due to the crisis, seeking to ban "food hoarding". Tourism, which provided the economy with an input of foreign currency, has been significantly impacted as a result of the ongoing COVID-19 pandemic. Transport Sri Lanka has an extensive road network for inland transportation. With more than of paved roads, it has one of the highest road densities in the world ( of paved roads per every of land). The road network consists of 35 A-Grade highways and four controlled-access highways. A and B grade roads are national (arterial) highways administered by Road Development Authority. C and D grade roads are provincial roads coming under the purview of the Provincial Road Development Authority of the respective province. The other roads are local roads falling under local government authorities. The railway network, operated by