An OJS measures how well you can do the job, i.e., follow the the methods, so it does not matter whether you are on your own route or covering a different one.
It would be a much more effective ride if you were on your own route.
Do the job. No one's perfect. OJS's are great when you don't know the route. Time slips away, killing their false numbers.
Always remember, their numbers are made up in fantasy world. That's why the union doesn't recognize them. Never let them speed you up to a unnatural-unsafe pace.