There can be many cases for deviation from the predetermined ideal path. (Eg road closures, request from customer, traffic conditions, driver missed a turn.)
Of course the difference here seems rather large. They should have flagged it anyway. They can even simply automatically check with the customer and the driver too, to ask what happened?
Of course the difference here seems rather large. They should have flagged it anyway. They can even simply automatically check with the customer and the driver too, to ask what happened?