The High Court had ruled various state government indirect taxes to be unconstitutional, and the growth in collections from the federal government’s ramshackle wholesale sales tax was falling further and further behind the growth of the economy, as more of every consumer dollar was being spent on (untaxed) services rather than goods. An eventual move to charging motorists directly for using the roads could also be prompted by the declining effectiveness of the present tax system. As ever more of our car fleet moves from petrol-powered to electricity-powered, receipts from the nation’s main tax on motoring – the federal excise on petroleum – will wither away. Illustration: Matt Davidson Credit: But that’s not an argument used in the Grattan Institute’s report – written by Marion Terrill – advocating a move to congestion charging. Indeed, Terrill makes it clear she’s not talking about a general road user charge – that is, charging that covers the cost of building new roads and maybe also the costs of wear and tear to roads, accidents and so forth. (Even though such a general charge for road use may well be what we end up with.) No, Terrill is only on about charges designed to reduce excessive congestion.

So why might we get charges directed solely at reducing congestion? Because all of us hate it so much and because, even if it doesn’t increase in coming years as cities get ever bigger, you can be sure we’ll all believe it’s got a lot worse. Loading And, finally, because congestion charging is the most certain – and the cheapest – way to actually reduce congestion, not just promise to. State politicians have gone for decades claiming to be reducing congestion by spending billions on new freeways (and a lot fewer billions on expanding public transport), but it hasn’t happened. Why not? Partly because our cities keep getting bigger, but mainly because, in Terrill’s words, “most city-dwellers find car travel more appealing and convenient than other means of travel”.

Initially, a new freeway is much faster than the roads it replaces, but that just attracts more people who’d prefer to travel by car. They keep flooding in until the congestion increases the delay to the point where it’s about as bad as it was before. By contrast, we know that congestion charging really works. You’d still have to build more freeways and railways as the city grew, but many fewer. The technology for congestion charging is getting cheaper and better all the time. Terrill argues that congestion charges could be introduced in three stages. First is “cordon charging” where drivers pay to cross a boundary into a designated zone, such as a CBD. Next “corridor charging,” where drivers pay to drive along an urban freeway or arterial road. Then network-wide, distance-based charging, where drivers pay to drive within a designated network or area, on a per-kilometre basis. She says there are three reasons why now’s the time to get started. First, many people say that congestion charging couldn’t be introduced without a big improvement in public transport. Well, that’s just what we’re getting.

In recent elections, the winning party promised spending on public transport of $72 billion in Victoria, $42 billion in NSW and $13 billion federally. Specifically, Melbourne is getting the Suburban Rail Loop and the Airport Rail Link. Sydney’s getting Metro West, Metro City and rail to Western Sydney Airport. Second, the technology for congestion charging is getting cheaper and better all the time. Third, there’s now enough global experience - not just Singapore, London and Stockholm, but also Malta, Gothenburg and Milan, with Jakarta and New York on the way - to show that congestion charging works and that, despite initial opposition, is soon accepted as a big improvement. Terrill says that, in Sydney’s morning peak, for example, up to 21 per cent of trips are for “socialising, recreation or shopping”. A congestion charge wouldn’t raise much revenue. It wouldn’t have to be high to deter enough people to reduce road use in key parts of the city during peak hours. And remember, such charges are designed to be avoided. It’s true that motorists with lots of money could easily afford to pay the charge, whereas people on modest incomes couldn’t. But the claim that a charge would be unfair is exaggerated.