(27 Aug 2015, 8:08 am)GMitchelhill wrote Not all the time. Some routes have a range of factors that could test a vehicle, this could be a route with heavy traffic, tight estates, fast runs, short steep hills or long climbs.
Just look at YJ62 FFB on the Diamonds a couple of years ago...
The routes had only just got the mercs a year previous. Hardly going to upgrade a service again a year later.