When you import more vehicle than export out of the country then Rupees devalues more. Country needs to maintain valueable import of essential goods. Vehicle import is not much needed. Since people can use more public transport then. Rupee is depreciating more and more. The cost of living would rise. Sri Lanka is import dependent nation. We do not export more goods then we import. So Strong Rupee is vital for lower price of fuel and import of Sugar, Milk powder, meachinary etc.