The transitway will help make Mississauga and surrounding communities better through:
- Reduced Automobile Traffic
It is projected that the transitway will divert thousands of riders a day from private automobiles to higher-order transit, reducing automobile traffic significantly during high-volume periods.
- Reduced Emissions
With vehicle emissions contributing significantly to climate change; reduced traffic means better air for everyone.
- Efficient Use of Road Space
Mississauga will be able to move significantly more people without having to add to the costly public road network.
- Increased Safety
Public transit is the safest form of transportation. The rates of injury or death due to accidents are significantly lower for public transit users than for drivers of automobiles. 
- Increased Density
The Mississauga Transitway will support increased intensity and density of development along the corridor through Mississauga and the GTA, supporting the healthy growth of residential and employment centres.
[2-5] Canada Strategic Infrastructure Fund Submission, March 2007
A precursor service operated by GO Transit opened in 2003 using dedicated Bus Bypass Shoulders (BBS) on Highway 403 from Erin Mills Parkway to Mavis Road. The service has saved up to 10 minutes per trip during peak times, and GO ridership has grown from 4,000 to 12,000 riders per day since 2003.
Recent estimates indicate that over the next 30 years, the number of people living in Ontario will grow by as many as four million â€“ with the majority locating in the Greater Toronto Area. Our transportation infrastructure is already strained to the limit to support current levels of population and movement, so other solutions are required.
The transitway will support extensive express bus service for thousands of riders per day, making it faster and easier to travel to, from and through Mississauga and the GTA. It will play an important role in the continued evolution of the GTA, Canada's largest population and business centre. Mississauga's role in this development is pivotal due to:
- Location: Mississauga is strategically located between Halton Region to the west, Brampton to the north, and Metro Toronto to the east, effectively forming the hub for all travel in the western half of the GTA.
- Integration: MiWay ties in directly to the transit systems of its neighbouring municipalities. Mississauga is served by GO trains on three different rail lines, as well as numerous GO buses. Mississauga is also home to Canada's largest international airport.
- Population: Mississauga is home to more than 740,000 people, many of whom need to travel quickly and safely within Mississauga and into neighbouring jurisdictions each day.
- Business: Mississauga is a major employment centre for industry and commerce, home to more corporate head offices than any other jurisdiction in Canada.