The Tram 2000 is a type of tram vehicle that was originally designed for the Verkehrsbetriebe Zürich (VBZ), the municipal transport operator of the Swiss city of Zürich, and first introduced in 1976. Other variants of the type were subsequently built for the VBZ, for other Swiss operators, and for the Italian city of Genoa. The last vehicles to the design entered service in 1994, but the type is still in front line service with all its original users.

The Tram 2000 is a high-floor tram design, which has been built as a single section tram with two bogies, or as a two or three section articulated vehicle with three or four bogies respectively. Variants exist to both metre gauge and standard gauge, and can be either single-ended or double-ended. All vehicles share a similar angular body shape.

In 1976, Verkehrsbetriebe Zürich (VBZ) took delivery of their first batch of 60 Tram 2000 vehicles, for use on the Zürich tram system. These metre gauge articulated bogie trams have two body sections supported on three bogies. The centre bogie supports the articulation and only the outer bogies are powered, an arrangement that is designated Be 4/6 in Switzerland. As VBZ's network has turning loops at all termini, the cars are single-ended (have a driver's cab at only one end) and single-sided (have doors on only one side). The car bodies were built by SWS, the bogies by SIG and the electrical equipment by BBC. Of the cars, 45 are of standard configuration whereas 15 have no driving cabs and are so suitable only for use as a second unit in a coupled pair. The name Tram 2000 derives from the numbering series applied to these trams, but also reflects the fleet modernisation their introduction heralded.

The Forchbahn, a metre gauge suburban light railway in the suburbs of Zürich that shares tracks with the VBZ urban tram system, also took delivery of its first Tram 2000 vehicles in 1976. These units are slightly wider than their VBZ counterparts, and are non-articulated vehicles operated in permanently coupled pairs with a cab at each end of the pair. They have a Swiss type designation of Be 8/8 and 11 such units were delivered from 1976 to 1986. In parallel with these units, four unpowered driving trailers, of type Bt, were delivered in 1981 and 1982.

In 1981, the Neuchâtel tram system took delivery of four matching double-sided motor cars and control trailers, to a design derived from that of the Forchbahn cars. These built by SWS, whilst two further motor cars were added in 1988 with bodies built by Schindler Waggon and trucks by SIG.

In 1985, delivery of a second batch of VBZ trams commenced. As SWS was no longer trading, the mechanical part was supplied by Schindler Waggon. Of this batch, 53 were similar to the standard model delivered earlier, whilst a further 20 were non-articulated cars designated Be 2/4. Similarly to the 15 non-driving units of the earlier batch, these units have no driving cab and are only suitable for use in coupled pairs. This type was specially designed to permit optimal use to be made of the platform length of certain stops where platform extensions were not acceptable. Delivery of the second batch lasted until 1987.

In 1987 and 1988, a fleet of nine Be4/8 double-ended double-articulated cars were built by SWP / SIG / ABB for Regionalverkehr Bern-Solothurn (RBS) for use on the RBS suburban tramway to Worb. ^{[citation needed]}

For the opening of the Genoa Metro in 1990, a fleet of six Be 4/6 standard gauge double-ended single-articulated cars were built to the Tram 2000 design. Unlike their counterparts on Swiss tramways, these high-floor cars operate on segregated right of way and serve stations with matching high platforms.^{[citation needed]}