Road User Charging in the Greater Dublin Area

Road User Charging in the Greater Dublin Area


N O'Neill, National Roads Authority, IE; A O'Brien, AECOM, IE


Consideration of alternatives for delivery of a Road User Charging system covering approximately 300km of national roads in the Dublin Metropolitan Area


There have been significant improvements in the quality of national road infrastructure in the dublin metropolitan area in the past 15 years. Tolling is currently restricted to a single location on the M50 collected using Open Road Tolling technology.

Following the completion of a Traffic Management Study for National Roads, it was identified that road user charging could provide an important element of managing future demand, hence avoiding the necessity for significant further capacity enhancements over the period to 2025. On this basis, the National Roads Authority and Aecom have examined the requirements of a road pricing system which would cover approximately 300km of national roads in the Dublin metropolitan area.

The paper examines the form of road pricing (GPS based or DSRC Tag and Beacon systems) that should be considered for this geographical area, and the various technology available to support the deployment of such a system. This leads to the identification of a DSRC multi-point open road tolling system comprising 11 locations, but connected to a single back office and charging structure.

The paper examines the factors which influence toll location, including the pricing structure, diversionary impacts and engineering constraints . The trade off between a high number of locations at low individual costs and the low number of location at higher individual cost is explained, making reference to the impact on diversion and on the collection costs as a percentage of revenue. The discussion of costs is supplemented by a cost benchmarking exercise undertaken in consultation with a number of Open Road Toll operators across the world.

Our paper also provides a discussion of our approach to securing public support or the system, based on considerations of equity and financial impact on high frequency road users. We also provide a discussion of the European Union directives on tolling and how our proposals are iin compliance with those requirements.


Association for European Transport