Transport in Thailand is varied, with no one dominant means of transport. For long distance travel, bus transport dominates. Low-speed rail travel has long been a rural long-distance transport mechanism, though plans are underway to expand services with high-speed rail lines extending to several major regions of Thailand. Road transportation is the primary form of freight transport across the country. Areas with navigable waterways often have boats or boat service, and many innovative means of transport exist such as tuk-tuk, vanpool, songthaew, and even elephants in rural areas.