Trying to make sense of the Metro Tunnel “concept of operations” draft document
A couple of months ago PTV released a set of three technical documents related to the Metro rail tunnel.
I’ve done some skimming through two of them so far (I hope to read the third soon), and am posting some notes from the first one here that I hope might be of interest to people: the MM1 Concept of operations document (draft paper) from March 2011.
I’ve tried to make sense of the material — some of it is somewhat jargon-laiden. If anything catches your eye, you should go to the source document, in case I’ve misread/misinterpreted/editorialised — or leave a comment below, and I’ll take another look and try to clarify, and/or try and find out from a contact on the project team.
A little bit of jargon I’ve left in: MM = the Melbourne Metro tunnel. Originally it was thought it would be built in two stages. MM1 was the proposed first stage, Footscray to Domain; MM2 was the proposed second stage, Domain to Caulfield.
The current thinking is for one project with a shorter total length than the original concept: Footscray to South Yarra, but some of the document refers to MM1 and MM2 as separate subprojects.
The reason I find this specific document of interest is it gives a glimpse of what the planners have in mind for operating the train network 10-20 years in the future. It’s different from the possible 2021 timetable in the Rowville documents because it’s got more detail, appears to be more ambitious, and obviously because it assumes a network that includes the tunnel (though it gives an indication of what’s planned even without it).
Parts of the document talk about what the project is, and why the Department of Transport believes it’s important. In the excerpts and notes below, I’ve concentrated more on how they intend to use the infrastructure — eg what services they would run.
Note that it concentrates purely on the lines to the north/west and the south/east, as those are the ones predicted to be subject to strongest patronage growth, and linked to/affected by the proposed tunnel.
So then, notes from my skimming, with page numbers.
p6 – intent is to run Sunshine (eg Sunbury and possible future Melton) via tunnel to Dandenong (Cranbourne and Pakenham). Frankston line would go to the Loop, and Sandringham line would through-route to Williamstown and Werribee. (Currently most Frankstons are the ones through-routed to Williamstown and Werribee.)
p6 – a specific objective of “turn up and go” services “all day every day”. In other words: throw away the timetable. It’s very good to see this in here; recognition of what a big city needs for its rail system.
p6 – sectorisation of Northern group into 3 sectors: Newport (eg Williamstown/Werribee), Sunshine (Sunbury and eventually Melton), and Craigieburn/Upfield.
p6 – aim for longer (9-car) trains on Dandenong corridor, which I guess means Sunshine corridor too if they’re connected.
p7 – notes 70% patronage growth in the last decade, and summarises their long-term plan:
- operational changes
- Laverton, Craigieburn, Westall upgrades and extra trains
- electrification to Sunbury
- Regional Rail Link (RRL; the V/Line tracks from Southern Cross via Sunshine and Tarneit)
- MM1. Talks about this being the enabler for electrification to Melton.
- Dandenong corridor upgrade
- MM2 and Melton electification
p8 – talks a bit about forecast patronage growth (which is covered in more detail in one of the other documents). They assume the busiest hour is 60% of busiest two-hour period (eg the balance of peak of the peak vs peak shoulder)
p9-10 – lists existing upgrade projects, including completed ones like the Laverton turn-back/third platform, and planned reduced crew changeovers in peak at Flinders St
p10 – Regional Rail Link will enable extra metro services to Sunbury and Werribee
p11 – 38 X’trapolis trains, then 32 “Next Generation Trains (NGT)/Xtrapolis” to replace Hitachis and run in paths created by RRL. What’s actually happened so far is 7 extra X’trapolis trains got funded. In the 2010 election, the Coalition promised another 33 beyond 2014, but they’re not funded yet. The wording here seems unclear if they’d go for a new design or more X’Trapolises.
p11 – Projects in p9-11 (eg RRL and the other stuff that’s pretty much already happening) helps meet projected demand until 2018.
p12 – has a nice diagram (above) of operations up to and including Regional Rail Link, and summarises operations at present (and pre-tunnel) in peak, notes these changes represent a 40% increase in Northern group capacity. Includes 13 trains per hour (tph) from Sunbury, 13 from Newport (eg Werribee, Williamstown, Laverton), 12 tph from Craigieburn (7 of these running direct to Southern Cross and Flinders St) and 4 tph from Upfield.
p14-17 – Summary of demand vs supply on the Northern group. Newport lines forecast to exceed supply after 2015, Craigieburn after 2016, Upfield after 2016, Sunshine after 2014.
p18-19 – All Northern group lines forecast to be widespread load breaches (eg bad overcrowding) by 2020
p21 – summarises peak hour capacity again, but compares 2010 vs post-RRL vs what the metro tunnel implementation would provide.
- 2010 timetable: 46 trains per hour (from Craigieburn, Upfield, Melton, Sunbury, Werribee and Dandenong)
- With upgrades including RRL: 61 tph
- With MM1: 75 tph
- With MM1 and Melton electrification/duplication: 80 tph
- With MM1 + MM2 including Dandenong line upgrades: 86 tph
- With MM1 + MM2 + 9-car trains: 109 tph (equivalent)
p22 – talks about current planning (well, as of 2011) vs the Victorian Transport Plan in 2008. Of particular note is a change in priority regarding the need for extra tracks outbound from Caulfield, in part by introducing longer trains.
p23-24 – summarises operation with MM1 (but as we know, it’s now planned for the MM1 and MM2 to be implemented as one project)
p24-26 – summarises operation with MM1 plus Melton electrification
p26-29 – summarises operation with MM1 plus MM2, including Melton electrification. This also flags additional projects, including:
- Quadruplication between Deer Park and Sunshine
- Dandenong upgrade with better signalling and grade-separation
- Duplication to Cranbourne (and extension to Cranbourne East)
- An extra platform at Sandringham
- (elsewhere in the document it’s clear it assumes Caroline Springs station will be built.)
p30 – Talks about platform and stabling extensions, and power and signalling changes to allow 9-car (232 metre) trains on the Sunshine to Dandenong via tunnel corridor. Initially extension would be to 7-car trains, then 8-9 later.
p31-32 – Service plan (timetable) design principles. “A metro service should offer all passengers a train at least every 10 minutes at peak times”. Aiming for seats for all passengers making trips of more than 25 mins to the CBD cordon. Recovery time of 6% of total trip time. Some interaction with RRL, including RRL single track lines (in other words, Bendigo and Ballarat).
p34-38 – Service plan for the Cross-City group (Werribee and Williamstown to Frankston and Sandringham) if MM1 is built. This also applies to MM2, however as noted on p49, Frankston would be moved into the Loop, and Sandringham would be the line through-routed to Werribee and Williamstown.
p34 – graph showing paths into Flinders Street from the Werribee and Williamstown lines. I think I need to sit down with a bottle of wine and a few hours to spare to fully understand this.
p35 – Off-peak service provision: basically aiming for every 10 minutes until 10pm, every day. Some lines every 10 minutes in the late-evenings as well. The major exceptions here are Laverton (Altona Loop) and Williamstown trains, which would be every 20 minutes — shuttles at night and early in the morning, to the City at other times, with stations between Newport and the City thus getting trains every 5 minutes at most times. (I’ve pondered this before and wondered if it would be over-servicing the Newport to City stretch, but perhaps with forecast population growth, it’ll be needed. Would certainly make for a more attractive service for prospective passengers.)
p36-37 – number of trains needed, and it also notes the change to the number of train kilometres: about double.
p38-43 – Service plan for the Northern Loop (which would be the Upfield and Craigieburn lines). This wouldn’t change with MM2. Basically these lines would run at least every 10 minutes from morning to 10pm, and every 15 minutes outside those times. However at times of 10 minute services, every second Upfield train would start/end at Gowrie to get around the single track problem there. Hey, maybe they should just duplicate it??
p43-48 – Service plan for the Metro tunnel group (Sunbury and Melton to Domain). This section doesn’t really apply anymore, since MM2 would link it to Dandenong. See later.
p49-53 is the plan for the full tunnel (MM1 and MM2), which is how it’s now planned the tunnel would be staged.
p51 – the peak service pattern for the Metro tunnel (including Melton electrification) would be 8 tph between Sunbury and Cranbourne, and 8 tph between Melton and Pakenham (hey Deer Park/Ardeer would finally get a decent service), plus 4tph Rockbank to Pakenham, 6tph Sydenham to Westall (or some to Dandenong).
p52-53 has those wacky graphs again, this time in both directions. The document doesn’t yet have details of off-peak service patterns, but presumably it’s planned to be 10 minute services for the most part, in line with the stuff on page 46 under MM1.
p55-56 Fleet impacts, including stabling and numbers of trains needed: looking at 244 trains in total.
p57-58 V/Line and freight impacts from Metro services. Hmm, paths to/from Seymour every 22 minutes? I guess they’re used to messy timetables.
p59- Details of the reliability modelling they’ve done: aiming 90% or higher within 4:59 minutes for the affected groups.
p61-67 Has some pretty graphs showing how the metro tunnel capacity increases will match forecast demand. (The forecast demand is the subject of one of the other documents — obviously it’s the forecast peak CBD demand which is the primary determinate of whether or not the Metro tunnel needs to be built at all.)
Overall this is interesting stuff. It’s of some comfort that this type of planning has been going on, and it’s good to see out, even if it’s somewhat indigestible in the form that it’s been published.
There’s some debate about how much can be done in terms of boosting services without major new infrastructure such as the tunnel. It’s good to see some of the steps being taken ahead of the tunnel eventually being built. (Remember: at the moment it’s just an idea, with no construction funding, and no commitment from either side of politics to build it.)
And I’d note that many of the service improvements (in particular the off-peak boosts to cut waiting times) could be done whether or not the tunnel gets funded.
It’s great to see some level of official recognition that planning for frequent trains all day, every day, is something that needs to happen — it’ll be important to get political backing for this as well, to ensure the funding is made available. Along with more frequent connecting buses, it’s critical to ensuring more Melburnians have a viable alternative to joining the traffic. And it’s cheaper and more effective than building new roads.