The OPP has zero stomach for engaging any vehicle. When the Comm Sargent gets wind of a pursuit, he radios instructions for the cruiser to pull over if the vehicle being flagged doesn't stop. In this case they were going to great lengths to arrange unmarked cars to be in the right place to follow this truck and to keep marked cars well out of sight along the route.
They did try throwing some spike belts out a couple of times when the rig was on a county road, but they didn't seem to work. When the rig was in London, the LPS used more belts and maybe that's what eventually stopped the rig.
The rig's speed and driving habits were radioed in constantly. This guy kept to the posted speed, signaled every turn, stopped at every sign and light. So his threat-level to the public was hard to judge. I was thinking they could have rolled a couple snow plows out and arranged them to block either end of a long county road he was on to at least contain him. On air, they theorized he had a few thousand km worth of fuel on board, good for many hours of touring.