(166/200) When passing a stopped emergency vehicle (police, ambulance, tow truck) with its lights activated and you cannot move over, what is the maximum speed you must slow to?

In Alberta, when approaching a stopped emergency vehicle (police, ambulance, tow truck) with its lights activated, drivers must slow down to a speed that is no more than 60 km/h below the posted speed limit, but if the posted speed limit is lower than 60 km/h, you must travel at that lower speed. This rule is outlined in the Alberta Driver's Guide and the Traffic Safety Act, specifically for passing stopped emergency vehicles on roads with a speed limit of 80 km/h or less. The requirement is to slow down to a maximum of 60 km/h or the posted speed limit, whichever is lower, when you cannot safely move over to an adjacent lane.