(1) How many verification devices for vehicle licences as well as other devices for road safety policing, including the vehicles in which they are transported, do the SA National Roads Agency Limited (Sanral) and the Johannesburg Metro Police Department (JMPD) have at their disposal; (2) why does the JMPD use the vehicles provided by Sanral that are fitted with e-toll badges only on the tolled roads and not during road blocks on the N14 highway; (3) on what legal basis does the JMPD and/or provincial police traffic rely when holding road blocks on highways?