The official paper currency of Panama is the U.S. dollar bill. There is no bus service to and from the international airport, but taxis are often shared with other passengers. Buses and taxis are readily available. As for longer distance travel within the country, domestic flights and railway service run regularly between major population centers. There is no bus service, however, taxis may be shared with other passengers.
Car rentals are also available.
The U.S. system of weights and measures and the metric system are both used in Panama. Speed limits are posted in miles per hour in some places and kilometers per hour in other places. Some signs have both mile and kilometer speed limits. Communication Panama's official language is Spanish. However, English is widely spoken as a second language in the main cities and among professionals and businesspeople.