Up-armoring of vehicles is in process for Army. For around 50,000 troops, somewhere between 3500-5000 armored vehicles are required. There are many variables. MRAPs don't carry cargo. Some roads cant take vehicles beyond a certain tonnage. Some vehicles become heavier with up-armoring and get slower in time critical missions and to provide support. Sometimes in emergency, light skinned vehicles of those formations are used which do not posses up-armored vehicles for such operations. There are counter-methods against ambush like RPG attacks but against road side bombs and IEDs the roads need to be monitored everyday by local LEAs otherwise the Sapper battalion will be detecting bombs and IEDs along all GT roads of Pakistan. Usually MP is piloting and securing military convoys. This is an Intelligence failure on convoy route which is unforgivable.