ACOTRAL MR 100

The MR 100 and MR 200 were rapid transit rolling stock types operated by STEFER and later ACOTRAL on the Termini-Laurentina Metro, later known as Line B of the Rome Metro, and later the Rome-Lido Railway from February 1955 to 2010.
==History==
The MR 100 was the first rolling stock in operation on what would become the Rome Metro. Development of the sets would commence in 1953, with construction proceeding thereafter. A total of eighteen cars were built, numbered MR.101 through MR.118; the car's bodies and other mechanical portions were manufactured by Officina Meccanica della Stanga, their bogies by TIBB and their electrical systems by CGE.
The MR 100 entered service with the opening of the Termini-Laurentina Metro on 9 February 1955. Following an increase in traffic and demand for trains running from Termini to Lido di Ostia, STEFER ordered 22 more cars, designated the MR 200; these entered service in 1956. More modern trains, the MR 300s, were introduced in 1976. The line was renamed Line B in 1980 with the opening of a new line from Anagnina to Ottaviano, named Line A.
Beginning 1987, the MR 100, MR 200 and MR 300s were replaced with MB 100 trains on Line B; following further modifications and modernizations to the line, the three train types were fully replaced with the MB 100 with the line's modifications preventing them from running on Line B. The trains were then moved to the Rome-Lido Railway, where they operated until about 2010. It is said that a number of MR 100s were rebuilt into MR 600s on the Rome-Lido Railway.
No MR 100 or MR 200s have been preserved.
==Design==
As the first rapid transit rolling stock built for an Italian railway system, the MR 100 and MR 200 had to be designed from the ground up as no reference could be made to previous types of rolling stock. They use a curved design, apparently popular at the time, and feature larger dimensions than most other rapid transit rolling stock.
Each set is usually coupled in two-car pairs with no gangway connection between the cars. Multiple cab cars would sometimes be coupled back to back.
==Specifications==
The MR 100 and MR 200 used a CGE-manufactured rheostatic control system. The sets ride on Brill 97-E bogies manufactured by TIBB.
Category:Electric trainsets
Category:Stanga locomotives
Category:ACOTRAL locomotives
Category:Rome Metro locomotives