The Greater Richmond Transit Company (GRTC) runs the public bus system that serves the Richmond metropolitan area. Those who don't want to fuss with exact change can buy a Go-Card at almost any convenience or grocery store. The bus routes access most of the major cultural attractions in Richmond and are therefore useful for tourists. Richmond is well supplied with more than 40 taxi companies, with cab ranks outside most major hotels, the airport, Amtrak, and the Greyhound terminal. The city also offers plenty of walking tours and is relatively compact and easy to negotiate on foot. It is worth hiring a car to explore the outlying regions, but not entirely necessary if staying in town, traffic is usually fairly light and parking relatively easy to find which makes driving in Richmond a pleasure.