Dessie Ellis (Dublin North West, Sinn Fein) | Oireachtas source

I do not think it is necessarily saying that blanket rules would apply but it is saying that in clearly defined residential areas a local authority could bring them in. If someone is doing 30, 40 or 50 km/h in a 20 km/h zone, we know that the fatalities go up. One is, therefore, putting a situation in place whereby one can gauge that a person must have been going at a certain speed and he or she did not keep within the 20 km/h limit. The point of having the signage there is to try to slow people down. We will know by the impact and the injuries that a vehicle in question was travelling at a certain speed. That is the argument.