The ATM Class 4900, Nicknamed the "Jumbotram" is a series of
articulated tram
Trams have been used since the 19th century, and since then, there have been various uses and designs for trams around the world. This article covers the many design types, most notably the articulated, double-decker, drop-centre, low-floor, ...
s used by the
ATM on the
Milan urban tramway network.
They were built from 1976 to 1978 in two series, by
Fiat Ferroviaria
Alstom Ferroviaria S.p.A., formerly known as Fiat Ferroviaria S.p.A., is the Italian division of Alstom. Fiat Ferroviaria S.p.A. was the rail division of automobile manufacturer Fiat. It was founded in 1880 as Società Nazionale Officine di Sav ...
and
Stanga, respectively, and were intended to be used on the future
light rail
Light rail (or light rail transit, abbreviated to LRT) is a form of passenger urban rail transit that uses rolling stock derived from tram technology National Conference of the Transportation Research Board while also having some features from ...
lines, like the proposed circular line that should substitute the existing
circular trolleybus line.
However such lines were never built, and the 4900 were used on the existing network.
Starting from 2008, some units were equipped with an air conditioning system, while in 2011 the 4950 car underwent both an aesthetic and functional revamping in order to gradually revamp the series. After a long phase of tests and checks conducted by the company operating the tram network,
ATM, in 2014 this unit entered service and by mid-2015 another 19 revamped units were delivered by the
AnsaldoBreda
Hitachi Rail Italy S.p.A. is a multinational rolling stock manufacturer company based in Pistoia, Italy. Formerly AnsaldoBreda S.p.A., a subsidiary of state-owned Finmeccanica, the company was sold in 2015 to Hitachi Rail of Japan. After the dea ...
company. As of 2018, there were a total of 40 revamped trams in service out of a total of 51 envisioned by the contract; the last car was delivered by the end of 2019.
In 2023, the cars which were not subject to the previous revamping still in service were repainted with Milan's yellow tram livery, which gradually replaced the original "arancio ministeriale" color scheme, so as to match the coloring of the other trams in service. The cars used a different scheme than the previous 4900 revamping.
Bibliography
* Carlo Marzorati: ''Le nuove elettromotrici ATM 4900.'' In: ″Italmodel Ferrovie″ Nr. 202 (March 1977), p. 156–160.
* Giovanni Klaus Koenig: ''Il tram a pianale ribassato: storia e sviluppi.'' In: ″Ingegneria Ferroviaria″, May 1985, p. 223–241.
* Giovanni Cornolò, Giuseppe Severi: ''Tram e tramvie a Milano 1840-1987.'', Azienda Trasporti Municipali, Milan 1987.
External links
References
{{Reflist
Tram vehicles of Italy
Light rail vehicles
Transport in Milan
Fiat Ferroviaria
600 V DC multiple units