The only experience we have is from other countries, obviously, but again, one of the beauties of this measure is that its cost is directly proportional to the uptake. So if it doesn't work, if nobody is taking you up on it, it doesn't cost the government anything.
We've done some estimates in terms of what we think the uptake might be over a period of time, and it's obviously something that would ramp up and would grow as it became more popular. Those estimates suggest that in the early years you're probably looking at somewhere between $10 million and $50 million per year, and it could then grow up to maybe about $100 million per year with very heavy take-up. That's based on experience that we've seen in the U.S. and other countries that have similar measures in place.
What I really like about it is that it's targeted and that it really has shown elsewhere that it works at the margin. In other words, it generates new demand and it encourages people to switch from driving alone in their cars to using public transit.