Bangkok, March 27 -- Thai Deputy Prime Minister and Minister of Transport Suriya Jungrungreangkit has instructed all relevant agencies to prepare for a surge of travellers during the upcoming Songkran Festival. Suriya said that 16.32 million personal vehicles are estimated to traverse Bangkok over the festival next month, with 7.01 million using highways and motorways and 9.31 million using expressways. Around 15.84 million people are tipped to use public transport, including buses, trains, boats and airplanes. To address the high travel demand from April 11-17, the Civil Aviation Authority of Thailand (CAAT) has been instructed to work with Suvarnabhumi airport and Don Mueang airport and coordinate with six airlines - Thai Airways, Bangk...