1. Presentation To Cherrywood Inquiry (Luas B1)
Mark Gleeson BA BAI MSc MIEE
Technical Officer
Platform 11

2. Platform 11. Ireland National Rail Users Organisation
Concerns
Capacity
Impact on existing passengers of Line B
Design
Road junctions
Stop locations
Route Choice
Glencairn Vs Harcourt Street
July 15, 2019
Platform 11. Ireland National Rail Users Organisation

3. Platform 11. Ireland National Rail Users Organisation
Capacity (1)
Existing Line B classic Dublin low density
Relatively static population
Higher density development on Line B1
Glencairn
Ballyogan
Cherrywood
July 15, 2019
Platform 11. Ireland National Rail Users Organisation

4. Platform 11. Ireland National Rail Users Organisation
Capacity (2)
RPA approach
Increasing frequency from every 5 to every 3 gives 67% increase
Reliability with level crossings ?
40m to 50m gives 34%
Possible impact on performance
Depends on platform lengths
Combined gives 123%
Is that enough ??
Is there sufficient capacity for the
Next 5 years? Next 10 years?
Line B already ahead of forecasts
July 15, 2019
Platform 11. Ireland National Rail Users Organisation

5. Platform 11. Ireland National Rail Users Organisation
Design - Clonlea
Listed status could lead to delays
Awkward CPO
Legal challenges
Could lead to an undue delay in the delivery of this project, with resultant impact on costs. In light of the ambitious targets laid down by Transport 21 this is of particular importance.
Vertical alignment suggests possibility of cut & cover
Glencairn stop is on a significant hill
July 15, 2019
Platform 11. Ireland National Rail Users Organisation

6. Platform 11. Ireland National Rail Users Organisation
Design - Depot Access
Still only one single track
Red Cow, Fairview and Inchicore
All at least 2 connections
Best practice
2 derailments leading to disruption already
July 15, 2019
Platform 11. Ireland National Rail Users Organisation

7. Design - Road Junctions
Many road crossings at or near T junctions in Ballyogan and Glencairn
Reduced visibility
Traffic management issues
Traffic queuing blocks tram line
Classic yellow box problem
T junctions are the most tricky of all level crossings
July 15, 2019
Platform 11. Ireland National Rail Users Organisation

8. Design - Racecourse Stop
Which racecourse ??
Stop name ambiguous
Location is distant from Leopardstown
Quicker + cheaper via Sandyford
No local access provided
Occasional status provides no local benefit
July 15, 2019
Platform 11. Ireland National Rail Users Organisation

9. Design - Emergency Crossovers
No emergency crossovers on the proposed 7.6km alignment.
Line B, which is of similar length has 2
At least one should be provided
Later addition of a crossover may require permission of the Department of Transport.
July 15, 2019
Platform 11. Ireland National Rail Users Organisation

10. Platform 11. Ireland National Rail Users Organisation
Route Choice
Harcourt Street route
More direct
Fewer at grade crossings
Minimal disruption during construction
However smaller catchment area
Glencairn route
Significant catchment and demand
Archeological issues
More CPO
July 15, 2019
Platform 11. Ireland National Rail Users Organisation

11. Route - Sandyford - Central Park
Selected alignment
Alternative
Continue on the Harcourt street alignment in parallel to the current depot to Brewery Road turn left and continue towards the Leopardstown roundabout
July 15, 2019
Platform 11. Ireland National Rail Users Organisation

12. Route - Sandyford - Central Park
Benefits
Reduced land acquisition
Provides full segregation
Avoid Burton Hall Rd
Awkward crossing
FAAC electronics site
Minimises disruption to existing Luas services during construction phase
Provides access to depot from both north and south sides
Maximises use of existing Harcourt Line
July 15, 2019
Platform 11. Ireland National Rail Users Organisation