Every weekend we dig into the archives. This by post Matt was originally published in March 2015.
The last census was two years ago and there’s already been a lot of analysis of the results of it. In terms of transport the census asks about Journeys to Work and while it is a fairly flawed metric due to it ignoring other trip generators like journeys to education – a large component of the morning peak in particular – it still has shown some interesting results. From it we know that in Auckland the number of people commuting to work by car increased, however it has partially come from fewer people carpooling and even more importantly it was eclipsed by the number commuting by PT. Add in the strong growth in people using active modes and there’s been the below shifts in modeshare.
I just happened to be looking at Stats NZ a few days ago and came across data giving a demographic break down of the results which is something I haven’t seen before and the results are fascinating. In particular the results that caught my attention the most were those by age and gender and how that had changed over time.
First up the total number of people who said they worked on Census day and you can clearly see from this the aging of the baby boomer generation.
Unsurprisingly the number of people driving a private vehicle to work looks fairly similar to the graph above. What is interesting are the other private vehicle categories of driving a company vehicle, driving a motorbike or scooter and being a passenger in a car.
Moving on to public transport I’ve only shown bus and train below because ferries are included in the Other category. What’s remarkable about the changes is that it so clearly shows that the growth in PT is being driven by the younger generations. The question is what the people in these younger age groups will do once they start getting older and having families etc. The changes in the older age groups suggest that the numbers using PT won’t drop off as much as they have in the past which will have big implications for mode share in the future.
I’ve also looked at the data for Wellington and while most categories have a fairly similar profile to Auckland, the one that stands out as being dramatically different is in train use. I suspect that as Auckland’s network matures it will start to look more like Wellington’s does now.
Next up are the active modes of walking and cycling with two very different trends. For walking its young people driving the change whereas for cycling it’s older generations making the shift.
Lastly it’s the Other – which is likely to primarily be ferries – and those who worked from home. The latter is primarily made up of people who live in rural areas and the wealthier coastal areas places within the urban area.
Overall there are some very interesting changes happening with how we travel and those are primarily occurring in non-car modes. If the younger generations continue to keep the current trends up then it’s likely to have big implications for how people get around in the future. The question is whether what we’re building is going to support that change or hinder it.
The other piece of demographic information available is mode usage based on gender. Unlike age the gender split over each mode doesn’t seem to be changing much over time but what the data does highlight is that there is quite a lot of variance between the two based on which mode is looked at. Overall 54% of those who said they were working are men versus 46% women.
In the graph below are the total numbers of each gender for each mode – with the exception of Driving a Private Car as it’s so large it makes it difficult to see the other results. The first thing you notice is how over represented men are in driving a company vehicle. This is also the case for riding motorbike or cycling. In the other modes more women than men are likely to be a car passenger, use PT, walk or work from home.
To highlight the degree of over or under representation the graph below shows this for females (the opposite can obviously bee seen for males). Of these the quickest and easiest I think that we could change would be cycling and to do that it is essential we make our roads safer through far greater use of cycle infrastructure.
If anyone wants to look into this deeper this info is also available by local board level which I’m sure would show some interesting results between different parts of Auckland.