Linto63 wrote:Assuming that no editing has taken place, the clip above shows the 11.1km from North Wollongong to Thirroul taking 8.25 minutes, an average of 80km/h and the 14.1km from Waterfall to Sutherland 9.5 minutes, an average of 90km/h. According to journey planner, express trains are tabled to cover these sections in 8 and 11 minutes respectively, or 83 and 77km/h respectively.
Distances from here
https://www.nswrail.net/lines/show.php? ... outh_coast
I know you think I resort to all sorts of dark trickery to present Sydney/NSW Trains in the worst possible light, but in fact I choose the better examples and round up figures so much I should get a job in the railways spin department, all in order to avoid accusations that I'm trying to do the dirty on them. But they do a good job of that themselves. They're generally speaking the slowest commuter services in Australia, period. The big, complex city excuse doesn't work either because Melbourne does a better job, even without the benefit of lots of track amplifications.
It may surprise many people - who assume that the curvy bit between Waterfall and Thirroul slows the south coast service badly - that the average speed doesn't actually rise even when the trains reach the straights to the north and south of that section. They still plod along at the same average speed - something below 60 km/h - all the way to Central and all the way to Nowra. Yes, as you observe, there's a little sprint on the straights either side, like a horse let out into the paddock, but once they've had this brief thrill they revert to the crawl. Rounding the time and distance figures very roughly, the 40 km between Central and Waterfall is covered in 40 mins, the 30 km between Waterfall and Thirroul in 30 mins and the 80 km between Thirroul and Nowra in 80 mins (without the Kiama wait). That's unwaveringly 60 km/h throughout, which with correction of figures to exact times and distances is 56 km/h. This is the (ahem) "fast" trains with 19 intermediate stops en route, averaging a stop every 8 km.
I have by my side the timetables, the statewide official railway distances to two decimal places and the track diagrams with speed boards etc, so I'm not short of information on which to do calcs. If I'm having a quick discussion like this I'll round the figures to favour the railways and I subtract the waits at stations, notably the Kiama transfer. (For the Gerringong-Berry-Nowra resident it is of course something below 55 km/h including that Kiama wait.) That average speed of 56 km/h remains roughly around the same whether in the Central-Waterfall section, Waterfall-Thirroul or Thirroul-Nowra. (Since the faster trains don't stop at Waterfall I use the passing time which is 9 minutes out of Heathcote.) How good is that, a train that runs at the same average speed whether it's on curves or on the straight? What could possibly be wrong?
Bringing the metro into it now and referencing that good run north of Waterfall, let's look at some comparative figures on a long, interurban-style non-stop stretch of about 6 km:
Sydney Metro:
Epping-Cherrybrook (6.2 km): 4 mins (average speed 93 km/h) (speed limit 100 km/h)
Sydney Suburban:
Heathcote-Waterfall (5.6 km): 4-5 mins (67-84 km/h) (speed limit 115 km/h)
(*that Heathcote-Waterfall express run fits with the mid-range average speed here)
Brisbane Interurban:
Ormeau-Coomera (6.8 km): 4-5 mins (81-102 km/h) (speed limit 140 km/h)
Perth:
Murdoch-Cockburn Central (6.7 km): 3 mins (130 km/h) (speed limit nominally 130 km/h but likely exceeded)
There's a pattern there. The south coast is run slow, no matter how good the running conditions. On top of that, the metro is a lively little performer, even over distances as well as stop-start - same formula in Perth of course. With the double deckers, we know about the curves and the poor stop-start performance, but there's something dreadfully wrong with the way those double deckers are being operated on the straight where's there's distance between stops. That's where they should be in their best element.