A sanrail, or sand rail, or sandcar, or "rail" is a lightweight motor vehicle specifically built for traveling across sandy terrain. It's most popular to operate a Sandrail in actual sand dunes, like Glamis, Pismo and Rasor in California, St. Anthony Dunes in Idaho, or Little Sahara in Utah. Sand dunes are located in all parts of the world and across the US. Sandrails are typically light weight cars that use high flotation tires, allowing the car to skim over the surface of the sand without getting stuck. A sandrail has a low center of gravity which permits it to turn even on the face of a sand dune. Many types of off-road vehicles are relatively top heavy and can only safely climb or descend steep hills with a mostly perpendicular approach to inclines or downhills.