You can't "tap", so of course you will be able to call

Fare gate at Renfrew SkyTrain station, Vancouver, BC

Fare gate at Renfrew SkyTrain station, Vancouver, BC (Detail)

The public transit system in Vancouver has adopted a new prepaid card system. The "Compass" card replaced paper tickets with a magnetic stripe.

The old paper ticket system just required that you carry a valid ticket or monthly pass while travelling. The new system requires that you "tap" in and out of every station. This is not problem if you are non-disabled, but if you have a disability that makes "tapping" a challenge then you are in a bit of a bind.

The solution to "call for assistance" is hardly a solution. Not really convenient if I am in a hurry, or if the disability that prevents me from tapping also prevents me from calling.