This morning The Age published more detailed train service data than we usually get to see. Some information is routinely published, but we rarely get an insight into the breakdown between AM, PM and off-peak punctuality, for instance.
In some ways the data was no great surprise — in the first week of March, hundreds of services were altered, including 71 Loop bypasses (City and Altona), and 399 shortened services, with 95% of them at peak hour in the peak direction. This matches the anecdotal evidence often heard from daily users.
Also not surprising is that peak services are less punctual than off-peak. As Jarrett Walker long ago wrote in his Human Transit blog, peak is when the system is at its most stressed — from numbers of trains and passengers on the network, causing congestion and longer dwell times at stations, with any delays snowballing much faster.
Some lines are clearly much worse than others — these figures have more detail than we usually see, but it’s reflected in the aggregate figures published in the Track Record monthly reports. The worst lines tend to be those with single track sections (which quickly causes delays to escalate) and those in growth corridors (more trains on the line, and more people getting on and off them)… with some unfortunate lines such as Cranbourne having both those attributes.
Lines directly or indirectly linked to those less punctual lines, such as sharing Loop tunnels, tend to get affected too.
What perhaps is surprising is that until March, the reliability and punctuality data wasn’t automatically captured. It was gathered by Metro themselves, and a sample was cross-checked by PTV. (In contrast, the tram network has had automated monitoring for decades — the data from it is used to feed into Tram Tracker. Buses are mostly monitored manually, with only a tiny sample ever being reported on — a small enough number to make it meaningless, though steps are underway to automate it.)
The sheer number of Loop diversions — about 10 per day, most likely concentrated at peak periods — is also surprising. This can cause a lot of disruption for people, and has flow-on effects to other services as people change trains. That’s if they’re told on time — I’ve been aboard a service that was diverted to bypass the Loop after leaving Richmond, giving no chance for people to change. Many were not happy.
The reasons for specific alterations weren’t included in the data, but we know this is gathered, as Metro get exclusions from performance penalties for problems they have no control over — which is fair enough.
Given we all pay for public transport services (as both passengers and taxpayers), is it not reasonable that this type of detailed information is published regularly? That would provide better visibility of delays and alterations, where and why they occur, and would cast light on specific parts of the network, what the problems are, and how they can be fixed — so voters can hold the operators, authorities and politicians to account.
Fixing the problems
It’s also important that the state government make sure Metro is only altering services for good reasons — such as a counter-peak service altered so a peak service can run on time, rather than just to help the punctuality statistics.
Metro may need to be pulled into line in the short term. How? Well former Labor transport minister Martin Pakula, while in opposition, seemed to think it was perfectly possible:
FORMER Labor transport minister Martin Pakula today called on the state government to force Metro to stop its practice of skipping stations to improve punctuality.
Mr Pakula says the situation could be easily resolved by Transport Minister Terry Mulder.
“There is the franchise agreement (between Metro and the state government) and there is common sense,” Mr Pakula says.
This can be resolved by the Transport Minister getting onto Metro and telling them it is not on.”
— Herald Sun, 19/4/2012
Metro should be willing to listen, given you’d imagine they’re seeking an extension to their current contract, which expires soon.
Longer term? Line-by-line targeted investments can make the system more reliable, starting with those single track sections. And the new contracts (due during this term of government) need to be made more watertight against strategies like station skipping, to ensure the service is run in the interests of passengers.
Does the frequent part of the network need timetables?
A change in emphasis should also be considered. As the system transitions to a more “metro”-like network, with segregated lines running frequently, it’s arguable that specific train times matter less than keeping the service running frequently. For instance, if a 5 minute service is in place, it doesn’t matter if the 8:00 train arrives right on 8:00 — instead the contract might be structured so penalties apply for gaps between trains of more than 5.5 or 6 minutes.
The current regime has undesirable impacts right now. For instance, South Yarra sees dozens of trains every peak hour to the City, but some have to wait there for the timetable to catch up to them. This doesn’t make sense. If the 8:51 arrives early, and there’s a slot for it ahead to get into the City, and there’s another train right behind it, let it leave early.
Equally, if trains are running every 10 minutes down the line, and one gets cancelled, a big 20 minute gap eventuates. To even out the loads better, if it doesn’t cause any other problems, it might be better to hold the train before it and run it 5 minutes later, creating two 15 minute gaps instead.
If trains are frequent enough, people don’t bother with timetables. Eventually, if the network and the contracts are structured the right way, the operator could work to provide a frequent reliable service, where you know you’ll get to where you’re going quickly, rather than trying to meet specific train times which don’t matter anyway.
An issue to think about for the future.