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Potential response to road user charging in Dublin, Ireland O'Mahony, Margaret ; Geraghty, Dermot ; Humphreys, Ivor

By: O'Mahony, MargaretContributor(s): Geraghty, Dermot | Humphreys, IvorPublication details: Transportation Research Record, 2000Description: nr 1732, s. 50-4Subject(s): USA | Road pricing | Test | Journey | Journey to work | Behaviour | | Peak hour | Mileage | 22Bibl.nr: VTI P8167:1732Location: Abstract: Transport strategies in Dublin before 1990 were primarily road based with particular emphasis on increasing road space within the city for the car. In the early 1990s, however, the Dublin Transportation Initiative recommended a more innovative strategy, the core of which centered on public transport. Implementation of the strategy is currently under way, but increased economic activity, with associated increases in car ownership and usage, has undermined the potential to address the imbalance between transport demand and supply, particularly in the shorter term. As a result, feasible and reliable public transport alternatives do not currently exist for car users on some radial corridors. The ongoing implementation of bus lanes and an increase in the number of buses should go some way in improving the reliability of the service. It is against this background that road use pricing is considered. The potential user response to road user charging is examined by means of a pilot action project to investigate whether further evaluation of the measure would be justified on a larger sample. The distance-and-time-based time-differentiated pricing method used in the pilot action induced a significant decrease of 22% in car trips and a 23% reduction in distance traveled during the peak period, reflecting the relatively high road use charges applied in that period. The total distance traveled decreased by 13%. The road user charge reflects the marginal external costs of car travel in the peak period in Dublin.
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Transport strategies in Dublin before 1990 were primarily road based with particular emphasis on increasing road space within the city for the car. In the early 1990s, however, the Dublin Transportation Initiative recommended a more innovative strategy, the core of which centered on public transport. Implementation of the strategy is currently under way, but increased economic activity, with associated increases in car ownership and usage, has undermined the potential to address the imbalance between transport demand and supply, particularly in the shorter term. As a result, feasible and reliable public transport alternatives do not currently exist for car users on some radial corridors. The ongoing implementation of bus lanes and an increase in the number of buses should go some way in improving the reliability of the service. It is against this background that road use pricing is considered. The potential user response to road user charging is examined by means of a pilot action project to investigate whether further evaluation of the measure would be justified on a larger sample. The distance-and-time-based time-differentiated pricing method used in the pilot action induced a significant decrease of 22% in car trips and a 23% reduction in distance traveled during the peak period, reflecting the relatively high road use charges applied in that period. The total distance traveled decreased by 13%. The road user charge reflects the marginal external costs of car travel in the peak period in Dublin.

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