Visas : For the stay of up to 30 days the citizens of the following countries do not need a visa for Montenegro: EU countries, Andorra, Albania, Australia, Bosnia and Herzegovina, Byelorussia, Bulgaria, Croatia, Israel, Island, Japan, Canada, Liechtenstein, Macedonia, Moldavia, Monaco, Norway, New Zealand, Russia, Romania, USA, San Marino, Switzerland, Ukraine, Vatican. To enter Montenegro all you need is a valid passport. Citizens of other countries need visas (which can be issued in any diplomatic mission of Serbia and Montenegro). For the latest up to date information on tourist visas, use the quick check tool at www.VisaorNot.com to check if you do in fact need a visa.

Car insurance: There is a mandatory insurance of the vehicles at the border crossings. The green card is valid for the following countries: Albania, Andorra, Austria, Belgium, Bosnia and Herzegovina, Bulgaria, the Czech Republic, Denmark, Estonia, Finland, France, Greece, Croatia, the Netherlands, Ireland, Italy, Israel, Iran, Island, Cyprus, Latvia, Luxemburg, Hungary, Morocco, Malta, Macedonia, Moldavia,Germany, Norway, Portugal, Poland, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Tunisia, Turkey, Ukraine, Great Britain.  You can go to the Automoto Association of Montenegro if you want more info.

Border crossings: Albania - Bozaj and Sukobin Bosnia and Herzegovina - Sitnica, Vilusi, Scepan Polje Croatia - Debeli brijeg

You can find out more information from the FAQ section of the visit-montenegro.org site.