I'm pretty sure Ambulances aren't allowed to go faster than what is considered 'reasonable', and they certainly can't do it without regard for the safety of others. They're only allowed to go faster than the speed limits if they do not danger life or property. In some areas they must also believe that the speed is necessary to save the life of their passengers (though not all areas)
85 mph at an intersection, in what's likely a 50 mph speedlimit, is probably not 'reasonable'. I think most ambulances tend to stay within 10 mph of the speed limit, unless the roads are empty. Some stay within more than that.
85 mph at an intersection, in what's likely a 50 mph speedlimit, is probably not 'reasonable'. I think most ambulances tend to stay within 10 mph of the speed limit, unless the roads are empty. Some stay within more than that.