The increased demand for shrimp in world market has encouraged Thailand to enter in to the practice of shrimp farming which has had a significant impact on the its mangrove forests and coastal environment. Conditions for shrimp farming are ideal in Thailand with 2,700 km of coastline, much of it sheltered, warm, calm seas and abundant natural seed.
Road network promotes economic development of a country through trade and tourism.
Asian Highways have a great impact on present and future developments by helping in reducing the regional disparity prevalent in the Asian countries and providing better access to the underdeveloped regions. Status of road network in most of the Asian countries in terms of their condition as well as connection to neighbouring countries is very poor at present.