Scooters typically refer to a small version of a motorcycle (like a vespa or moped) sometimes called motor scooters, but scooters can also be a mobility scooter intended for the elderly or disabled or a smaller non-motorized stand-up scooter for children. Aside from the childrens' version, scooters are motorized and either electric or gas-powered. The top speed of the fastest scooters is around 70 miles per hour (mph), but somewhere around 45 is typical. For this reason, most scooters are not allowed on freeways in the United States. Scooters are becoming increasingly popular as a way to help save both the environment and money on gas. Below is a list of the top websites about scooters, but mostly sites and companies that sell various types of scooters. Feel free to "add a site to this list" at the bottom left.