The Class 399 was built to augment the existing rolling stock on the Sheffield Supertram and enable an extension to Rotherham Central. The extension requires travel over the mainline and thus the Class 399s are built as tram trains with a dual voltage capability, higher crash worthy standards than other trams and fitted for dual-signalling to operate on the mainline tracks. The trams are fitted with mainline protection systems such as TPWS and are compatible with both mainline and Supertram signalling systems.
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| Supertram 399 203 at Hyde Park |
| Information | |
|---|---|
| Number built: | 7 |
| Built: | 2014-15 |
| Builder: | Vossloh Espana |
| Motor: | ABB traction system (6 motors) (750c DC / 25kv AC OHLE) |
| Power: | 1, 170 hp (870 kW) |
The Class 399 entered service in 2017. To operate on both tram tracks and the mainline, a new wheel profile was designed for these vehicles.
Three or four trams are dedicated at any one time for the Tram-train route of Supertram with the other Class 399s being used on other lines.
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| 399 203 departs Attercliffe |
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| 399 203 again, at Fitzalan Square/Ponds Forge |
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| 399 206 at Cathedral, Tram train services terminate here but this tram is on the Yellow Line |
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| The two types of Supertram rolling stock together |
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| 399 203 at Rotherham Central |