As of August 2021, 53% of the Express highway between Phnom Penh to Sihanoukville has been completed. The trip between Sihanoukville and Phnom Penh will be 2 hour. This will add a huge boost to Sihanoukville's and the islands' (Koh Rong, Koh Rong Samloem, and Koh Puos) tourism and real estate industries.