I never said anything about platform clearance. There are many curved platforms in Sydney and the trains can't take those curves at 160km/h and that speed is fast. Waterfall happened at 115km/h so yeah 160km/h can't be done on the ST network. Despite what Transtopic has mentioned the new fleet hasn't been built with 160km/h in mind. The new D sets has similar motors to all the other 4G trainsets and are built for the same 115km/h operation as S3 gunzel mentioned.
Waterfall occurred on a 200m radius curve. No-one is suggesting 160hph on 200m radius curves.
And @sims, if you haven't realised yet, I'm not having a go at you specifically/personally, but it is enjoyable to use you as a metaphor for the problems our NSW legacy rail system faces .
There are a few places on the ST network where there are XPT boards of 160, because for all the desire in the world, there is no reason to lower them. IMHO, there are many more places where the boards could safely be higher for little or no extra cost, but the inertia of "it can't be done" means it won't be done.
Between Woonona and Oak Flats there are only a handful of obstacles preventing 160kph operation, representing over 30min of transit time each way, which if realised would mean the hourly Kiama timetable could be fulfilled with 1 less train (and save $5-8mil per year, regardless of the benefits of service improvement). But ... "it can't be done" therefore it "won't be done".
I'm a realist, I know "it won't be done." But just so we are clear, in won't be done not because it can't be done, but because there are too many @simstrains in TfNSW, RailCorp, ST & others somehow on the Gvt Payroll for whom it is too convenient to believe "if can't be done".
BTW, @transurban, WTF R U?
I've refrained from commenting on this current discussion with regard to speed limits, because it's getting way off topic for this thread.
However, as sims continues to deny factual information, raising spurious arguments of why "things can't be done", I feel compelled to challenge his assertions.
I agree with you djf, that "things CAN be done" if the Sydney Trains' management show a willingness to implement change to improve the performance of the network. I don't share your pessimism that they are not up to the task, as there are already signs that this process is underway. The proposed introduction of ATO across the network will be a game-changer, in spite of sims' denial. It will allow for closer headways and higher average speeds, all controlled automatically similar to the metro. The only difference will be that the Sydney Trains, Intercity and Regional train fleets will be monitored by a driver/attendant, who will intervene in the case of an emergency situation such as the fouling of tracks, which the driverless metro does automatically.
The latest rolling stock such as the Waratahs, Millenniums and even the H sets all have a maximum speed of 130km/h, although rarely utilised. The Waratahs have similar acceleration/deceleration performance to the metro trains, although again rarely utilised. ATO will enable them to make full use of their performance characteristics. Contrary to sims' assertion, it's my understanding that the current metro trains have a maximum speed of 100km/h, so I don't know where he gets his 130km/h from. In the face of the published facts, he still denies that the D sets will have a maximum speed of 160km/h. He seems to continue to think that it's just my opinion.
No-one is suggesting that suburban trains will run up to 160km/h, as they are limited to a maximum of 130km/h, but the D sets (and new Regional trains) will certainly be capable of that where track conditions allow it. I agree with you that there are sections of track within the Sydney Trains' network as you have suggested, where speed limits could be increased up to 160km/h for the new Intercity and Regional train fleets. This is particularly relevant on sections of the quadruplicated tracks on the Northern, Western and East Hills Lines, although I can't see it happening on the quad section of the T4 Illawarra Line. That doesn't mean to say that existing speed limits couldn't be increased on T4. However the raising of speed limits and frequencies is unlikely to happen until ATO is rolled out across the network.
I have studied the speed limits as indicated on the Sydney Trains' Drivers' Route Knowledge diagrams for the main lines in the metropolitan area and as far as I can see, the current maximum speed limit on the white boards is 125km/h. That's on the short length of track on the outer Main lines on the East Hills Line between Salt Pan Creek and Revesby. Otherwise the maximum speed limit on all lines is 115km/h. I couldn't see any white boards posted at 160km/h. That doesn't mean that there isn't the potential to increase the speed boards substantially higher where track conditions allow it, particularly when ATO is fully implemented.