Over 900 new speed zones came into effect across the country this morning.

The cameras are operating in areas that have a history of speed-related collisions.

903 new safety camera zones have been established around the country.

The cameras will operate in areas that have a speed-related collision history where fatal, serious injury and now minor injury collisions occur.

The data used to compile the list of locations was taken between 2016 and 2018 and showed gardaí that speeding zones have changed.

The National Roads Policing Bureau said it hopes the new speed zones will help to reduce the number of motorists driving over the speed limit, particularly in areas that they do not think of as high risk.

The data shows that some zones that would have previously been considered high-risk no longer are, because driver behaviour has changed, and people are using different routes in order to avoid traffic.

575 zones were removed because they were no longer considered high-risk areas.

Speaking to RTÉ's Morning Ireland, Superintendent Tony Lonergan of the Garda National Roads Policing Bureau said the removal of cameras from zones shows a change in driver behaviour, and that the new zones are targetting a small number of people who continue to drive in excess of speed limits.

"We're putting the message out there that we'd like people to slow down for the entire duration of their journey in order to help make the roads safer and to prevent fatalities and life changing injuries," he said.

The new safety cameras being launched today brings the total number of safety camera zones countrywide to 1,322.

The full list of camera locations can be found on the garda website.

The 20 stretches of road where most collisions happen are all in Dublin, according to the garda rating system which is used to determine the location of speed cameras.

Top of the list is the R111 stretching from Islandbridge to Irishtown, which follows the Grand Canal for most of the route.

The second most high-risk road is a 5.4km stretch of the R148 along the Chapelizod Bypass down the quays to the Customs House.

It is followed by a 21km stretch on the M50 from Junction 3 to Junction 11.

Outside Dublin the roads with the most collisions are the N8 in Cork, a one-way route around the city centre from Horgan's Quay to the Lower Glanmire Road, and the N4 between Longford and Roosky.