Sorry for your lack of road space, but the days of wide 3 lanes roads are coming to an end and have no issues with it.
Hurontario was to be a nine (9) lane road north of the CP tracks to Brampton and the land was put aside after an 1980 report call for it. As a pedestrian who currently cross 7 lanes, it bitch to do so as well the N-S traffic light can be up to 3 minutes long, regardless there is very little traffic on it. The speed has been reduced 10k in the past 5 year, yet you see highway speed on it from to to bottom.
Mississauga has no plan to widen roads over 4 lanes and it goes back to the day when Burnhamthrope was to be 7 lanes east of Hurontario after its EA was approved and was kill. Burnhamthrope west was to be reduced to 5 lanes, but it gone off the rail.
The city has under estimate what the LRT will do with the plan to loop the core as well going the the bus terminal now. There is currently 15-20 minute waste of riders time on a good day using the old 19 and the 2/17 is about the same today. You will save 5 minutes using the LRT each way and will increase to 20 minutes if the loop is built. You can add more time if the line gets split like the 2/17 to the point, that the folks who have access to a car will stay in the car, especially for the Eglinton area.
As for 9th line, it will be upgrade to 5 lanes down the road.
The city hasn't increased the model split since 2000 when I first start doing numbers for the system. The city is great doing the transit talk, but poor backing up the talk and it starts with density city wide. With you don't have density to support a route, petter hard to put quality service on it to get folks out of their car.
As Hazel used to say at council, time to built a wall around the city to stop people passing through her city and causing traffic mess within it.