Motorcycles ignored in traffic planning

Sydney traffic congestion motorcycles lane filtering planning

A Sydney traffic expert has slammed the NSD=W Government for not updating its infrastructure planning since the 1950s, yet he says motorcycles and scooters are not worth considering.

This is despite the fact that motorcycles and scooters have been allowed to lane filter over the past few years, easing some congestion.

However, Dr Michiel Bliemer, Professor and Chair in Transport Network Modelling in the University of Sydney Business School says motorcycles and scooters “do not significantly contribute to congestion on the road (at least in Australia) and therefore are typically not simulated on road networks for transport planning purposes”.

No, they don’t contribute to congestion, but their ability to slip through traffic eases congestion and they should surely be considered in infrastructure planning.

He does say that if motorcycle and scooter numbers increase substantially, “maybe this will need to be considered”.

Maybe he hasn’t heard of the oft-quoted Belgian study that found that if 10% of all private cars were replaced by motorcycles, it would reduce traffic congestion by 40%. If 25% went from steering wheel to handlebar, traffic congestion would cease.

Nor has he noticed that Australian motorcycle registrations increased 53.6% from 2007-2016 compared with passenger vehicle registrations of 22.3%. It is the fastest-growing motoring sector!

Yet two-wheelers are consistently forgotten in traffic and transport planning.

Outdated planningSydney traffic congestion motorcycles lane filtering planning

The Prof points out that modelling used by the State government to forecast traffic flows when planning new transport infrastructure such as WestConnex, has not changed since the 1950s and is flawed.

He points to the financially troubled multibillion dollar Cross City Tunnel as an example of infrastructure built without a “realistic” understanding of the number of vehicles likely to use it each day.

“The models that are being used today are based on the same assumptions that we made in the 1950s when there was virtually no congestion,” he says.

“These models still assume that congestion is very light and that queues are unlikely to form anywhere in the network.

“It’s a bit like going to the supermarket. The 1950’s model assumes that there are always enough checkouts and that queues will never form. When it comes to our roads, that kind of assumption is no longer valid, especially in Sydney where we have a lot of congestion that impacts on travelling times and that cannot be predicted by the old model.”

A lot of what the Prof says is true, but it is a shame that like so many infrastructure planners, he doesn’t consider the impact that motorcycles and scooters can have on traffic.

4 Comments

  1. What a shame more home work isn’t undertaken before publishing. Perhaps if there was more effort put in to understanding the research the political decision making might have been examined instead. As it is we can’t take any notice of this author anymore.

  2. It is unfortunate that my comments were misunderstood by the author of this article. Clearly transport models consider all modes of transport, including pedestrians and motorbikes, they are not ignored by transport planners at all, they all appear in the travel demand forecasts.

    However, pedestrians, bicycles, and motorcycles do not contribute to congestion so they need not be simulated on road networks to calculate travel times. If the model forecasts that many car drivers switch to motorbikes in the future, then the number of vehicles simulated on the road will be less and therefore congestion will reduce as expected.

  3. It’s the bureaucrats behind the politicians pulling the strings. A search of Austroad on Motorcycles found an interesting study done on everything to do regarding motorcycle safety motorcycle ONLY Advanced Stop Lines, Lane Filtering, counter lane filtering, special side lanes for motorcycles, should motorcycles be allowed to use bus lanes on main roads, it not bus only entry roads, Victoria Roads had a study done using a research company, world wide there has been enough studies done.
    Bureaucrats show politicians what they want to and what they don’t want them to see.
    If I was riding a pushbike they would build me a bridge.. oh wait they did in Brisbane!

  4. There is a disease amoungst politicians and bearuocrates and so-called infrastructure planers it’s the think big virus . Anyone who gets a little bit of power or influence always has to think big! You need a stop sign placed at an intersection you can’t have it ask for a massive roundabout requiring land resumption no worries!
    Anything that is not big and flashy will lose out to anything that is so motorcycles and scooters won’t be considered as they actually reduce the need for big and flashy. The only reason cyclists get such preferential treatment is not only their whinging but also they need cycle paths! Something big and flashy that planners get to design and politicians get a photo op over!

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