Transport in Luxembourg is ensured principally by road, rail and air. There are also services along the river Moselle which forms the border with Germany. The road network has been significantly modernised in recent years with motorways to adjacent countries. The advent of the high-speed TGV link to Paris has led to renovation of the capital's main railway station while a new passenger terminal at Luxembourg Airport has recently been opened. Trams in the capital were reintroduced in December 2017 and there are plans for light-rail and/or tram-train lines in adjacent areas.
All public transport in Luxembourg (buses, trams, and trains) has been free to use since 29 February 2020, as part of a larger mobility experiment with goals to increase walking for short trips, increase bicycling, and increase the transit ridership sharply as the network is enlarged and service frequency is increased.
Operated by Chemins de Fer Luxembourgeois (CFL), Luxembourg's railways form the backbone of the country's public transport network, linking the most important towns. The total length of operational (standard gauge) track is , though it was some at the end of the Second World War. There are regular services from Luxembourg City to Ettelbruck, Esch-sur-Alzette, Wasserbillig and Kleinbettingen while international routes extend to Trier, Koblenz, Brussels, Liège, Metz and Nancy.
The railway network links into Belgium, Germany and France. Some of the cross-border services are run by CFL, others by SNCF, NMBS/SNCB and DB.
There is now a frequent high-speed connection to Paris via the LGV Est line. EuroCap-Rail is a proposed high-speed axis connecting Brussels, Luxembourg (city), and Strasbourg.
The six Luxembourg motorways cover a total distance of , linking the capital with Trier (Germany), Thionville (France) and Arlon (Belgium) as well as with Esch-sur-Alzette and Ettelbruck in Luxembourg. Luxembourg's motorways are toll free. The speed limit is normally , in rainy weather. With of motorway per , Luxembourg probably now has the highest density of motorways in Europe.