As using public transport can be restrictive and limit your freedom to explore, you will no doubt be using a car to get around. Rest assured, Martinique is a French department and so the driving rules are quite similar to those in mainland Europe. Note that special speed limitations may apply in hilly areas of the island.  Hitch-hiking is also quite common and you will have no trouble getting around the island in this way.
To drive on the island, you just need a driving license and to be at least 18. However, most rental agencies will only rent vehicles to people aged 21 years and older and who have held a driving license for at least a year.
When at the wheel, vigilance is key.
Driving at night is more challenging as roads are often winding and unlit. After nightfall, we recommend using shuttle buses or calling a taxi if you feel uncomfortable driving a car.