In French Guiana, modes of transportation include airplane, boat, bus, and road. Within the Guiana Space Centre, there is a railway line for transporting spacecraft. The coastal area has the majority of the road network. You can get to Guiana's interior by plane or boat. In the interior, there are several smaller airstrips in addition to the main airport.
There are 1,311 kilometers of municipal roads, 408 kilometers of departmental roads, and 440 kilometers of national roads as of 2018. There is no highway here.
Cayenne and Saint-Laurent-du-Maroni are connected by RN1. Cayenne is connected to Saint-Georges by RN2.
The Oyapock River Bridge over the Oyapock River was built in 2011 following the signing of a treaty between France and Brazil in July 2005. It was the first land crossing between French Guiana and the rest of the world (there is also a ferry crossing to Albina, Suriname). Although the border post's introduction on the Brazilian caused additional delays, the bridge was officially opened on March 18, 2017.[4] Beginning in 2020, it will be possible to drive uninterruptedly from Cayenne to Macapá, the capital of the state of Amapá in Brazil.
In 2007, departmental routes were created, and the names of RN3 and RN4 to Cayenne – Félix Eboué Airport have remained unchanged.
A Route nationale from Saint-Laurent-du-Maroni to Maripasoula is in the works, but as of 2021, it will end south of Apatou.