Tatra T3

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Tatra T3
Tatra T3SUCS in Prague
Interior of old version
In service	1960–present
Manufacturer	ČKD Tatra
Assembly	Prague, Czech Republic
Family name	Tatra
Constructed	1960–1997
Entered service	1960
Number built	13,945 + 131 bodies
Predecessor	Tatra T2
Successor	Tatra T6A5
Capacity	110 / 95 (T3SU)
Specifications
Car length	14,000 mm (45 ft 11+1⁄8 in)
Width	2,500 mm (8 ft 2+3⁄8 in)
Height	3,050 mm (10 ft 1⁄8 in)
Doors	3 / 2 (T3SU)
Maximum speed	65 km/h (40 mph)
Weight	16,000 kg (35,000 lb)
Engine type	TE022
Traction motors	4
Power output	4×40 kW
Electric system(s)	600 V DC
Current collector(s)	pantograph
Wheels driven	8
Coupling system	Albert
Track gauge	1,435 mm (4 ft 8+1⁄2 in), 1,000 mm (3 ft 3+3⁄8 in), 1,524 mm (5 ft)

The T3 is a type of Czech tramcar produced by ČKD Tatra. A late-2000s study conducted on the Prague tram system has shown 98.9% reliability, the best of the Prague tram system fleet.^[1] During its period of production between 1960 and 1999, 13,991 powered units and 122 unpowered trailers were sold worldwide.

It became the most dominant tramcar model in Eastern Bloc countries, except for Poland, where locally produced trams from Konstal factory are still the mainstay in tram systems there, and Hungary, where ČKD only made inroads to the country's tram market during the late 1970s. Together with Soviet KTM-5 it is among the most produced trams, it is still in 2022 the most widespread tram car in the world.^[2][3]