The Corbally Road Roundabout Improvement Scheme
Limerick City Council
The existing Corbally Road corridor is one of the main commuter routes leading into Limerick City Centre. A number of the existing junction layouts along the corridor experience significant congestion throughout the day which generates notable delays for the Bus Eireann routes operating along this key corridor. In addition, the existing infrastructure proves problematic particularly for children walking and cycling to the various schools located in close proximity to this key commuter route.
DBFL were commissioned to identify an infrastructure solution which would provide an appropriate traffic management solution whilst priortising public transport and cyclists requirements and accommodiating pedestrians across key travel desire lines.
A number of scheme options were developed and analysed all of which included the conversion of an existing DMRB roundabout to a traffic signal controlled arrangement, introduction of bus lanes and ‘metering’ controls, new high quality cycle lanes, new off-carriageway bus interchanges and delivery of improved pedestrian measures.
The final delivery presented the Preliminary / Detailed Design of a significant junction improvement and road corridor widening works along a significant length of the Corbally Road corridor in Limerick City.
The principal tasks undertaken by DBFL included;
1) Initial infrastructure audits, road user audits, data collection and traffic surveys.
2) Appropriate Assessment
3) Development of three Do-Something Scheme Options
4) Network modelling and scheme simulations
5) Scheme Costings
6) Scheme Option Appraisal
7) Preliminary Scheme Design
8) Road Safety Audit