Tony Galloway wrote:

> Where TfNSW finds it’s uh, “expertise”

The article you posted refers to unspecified issues with the Sheffield-Rotherham extension of one of Sheffield's street tram lines to Rotherham via an old railway.

Metro Report has just published an article on this which refers to problems with the wheel profiles -- a problem Melbourne has never had, right from when it connected the Port Melbourne and St Kilda heavy rail lines to the tram system, using the same trams and same rails for both.

See this except:

> one underestimated challenge has been the development of a wheel profile suitable for use on both Supertram and Network Rail tracks. At present, he says, all seven vehicles have been delivered with the standard wheel profile used on the rest of the tram fleet. Four cars are to be modified with new wheels to operate the Sheffield – Rotherham service.

Full story including photo of the new tram. Hmm they are Spanish trams!

http://www.metro-report.com/news/light-rail/single-view/view/sheffield-tram-train-enters-service.html http://www.metro-report.com/news/light-rail/single-view/view/sheffield-tram-train-enters-service.html

david mcl, Wellington