The cost of tolls on some motorways around the country is expected to rise by 10c in the new year.

However private motorists on the two main tolled routes in the capital are to be spared price hikes.

The National Roads Authority (NRA) has confirmed that tolls on the M50 and Dublin Port Tunnel are to remain the same, but are expected to rise on parts of the M1, M8, M6 and N25.

However goods vehicles using the M50 face a 10c hike per journey from January 1.

The NRA said that other private toll operators will be able to increase their tariffs in line with the Consumer Price Index, a move which will affect certain classes of vehicle using the M1, M6, M4 and M7 among others.

The Department of Transport is also looking at introducing distance tolling on the M50.