--so that you could get a sense of both. It happens on both sides of the equation.
In the Toronto region, one of the main boundaries between the city of Toronto and York Region is Steeles Avenue, which is a major east-west corridor. Actually, one half of the street is a York Region street and the other half is a city of Toronto street. Trying to coordinate the widening and maintenance of that street can be challenging for the municipalities, because they have different visions of where growth is occurring in the two respective municipalities. There may be different views on both sides of the border about the impact on some sensitive environmental features. So it can be very difficult and complex to do something as straightforward as having a comprehensive long-term asset management plan for a shared facility. That's a road-based example.
In terms of a transit-based example, the fastest growing part of our transit ridership is people crossing municipal boundaries. In the Toronto region right now, every time you cross a municipal boundary, you have to pay a second fare, because you're going from, for example, York Region Transit to the Toronto Transit Commission, or you're going from Mississauga Transit to Brampton Transit. So there are integration issues, from a fare perspective, if you just want to cross a boundary.
There are service concerns in terms of coordination of those bus services as they cross municipal boundaries. We have challenges with having what's called a closed door policy. If you're on a Mississauga Transit bus and you cross the border into the city of Toronto, you can no longer pick up passengers in the city of Toronto, even if you're going by bus stops that have people waiting at them.
It's those kinds of coordination and integration issues we're trying to deal with at Metrolinx. The PRESTO smart card, particularly from a transit perspective, is a huge step toward doing that. It allows transit customers to pay their fares with one single card, and it does all the thinking for you.