Through the winding tunnels under the University of Saskatchewan, which connect the buildings that vary in age, elevation and repair, a person will encounter many ramps of multiple different characteristics. Some are steep enough that I would not feel safe climbing or descending them independently in a manual or power wheelchair. Others are properly and reasonably gradual, with many ramps falling between those two extremes.
The ramp pictured above is one of the better ramps in the tunnel system underground. The switchback halfway up gives a person an opportunity to rest, regain strength for the next climb, and can be a place to wait for a clear path to the next plateau. This ramp would be one example of one that is too narrow for multiple people at once and when the masses are moving through here it can become intrusive to be the guy in a wheelchair blocking everyone else's way.
Unfortunately, depending on the time of day and year, some of the access points in these tunnels are often closed or locked which necessitates venturing outside to find a suitable detour. Often choosing to take the tunnels is a longer distance than going outside but it can save exposing oneself to the elements. When you hit one of these dead ends, only to have to go outside to find a detour, it results in much wasted time and energy in backtracking. Far from a perfect system when time between classes is short, transportation arrival and departure times have short windows, and when accessible washrooms are less frequent than they should be.
Thoughts: If attendance at a post secondary education institution is in your future minimize those first stressful days by having a good explore to determine the best routes for yourself. Don't be afraid to mention to the appropriate counselor the problem areas that need addressing. It may not be fixed by the time you have completed your stay but, hopefully, you will be making it better for the next person who needs proper access.
