Oscar Traynor Road Development Traffic Capacity Study
Proposed Development Site
Surrounding Transport Networks Pedestrian Cycle Public Transport Vehicle Network Network Network Network
Coolock Aulden 350m walk route interchange 35m Grange 1.2km walk route Poor pedestrian Gaelscoil 50m Cholmcille crossing facilities Castletimon Rd 350m 1.4km walk route Shantalla Rd Direct Route Walking Route Pelican Crossings Pedestrian Network Issues
Coolock interchange Aulden Grange Castletimon Rd Shantalla Rd Bus Lane (no cycle lane) Cycle Lane Cycle Network
Coolock Aulden interchange 17a, 27b Grange 13mins walk 16, 33, 41, 41b, 41c 3mins walk Coolock Lane 27b Castletimon Rd 27b No. Bus Route 16 Airport to Ballinteer 9mins walk 17a Blanchardstown to Kilbarrack 27b Eden Quay to Harristown 33 Lwr. Abbey St. to Balbriggan 16, 104 41 Lwr. Abbey St. to Swords Manor Shantalla Rd 41b Lwr. Abbey St. to Rolestown 41c Lwr. Abbey St. to Swords Manor 104 Clontarf Rd to DCU Walk Route Bus Stop Bus Network
Coolock Aulden interchange 3 2 A Grange 1 Castletimon Rd 4 5 9 7 8 6 Shantalla Rd 12-hr junction turning count 7-day link count Traffic Surveys
Large right-turn movement Queues on slip extend from Oscar Traynor Road back to motorway Coolock Large left-turn movement Aulden interchange from Dundaniel Rd Grange Castletimon Rd Junction traffic volumes per hour 2,500+ 2,000-2,499 Shantalla Rd 1,500-1,999 1,000-1,499 500-999 Less than 500
Queues extend to on Large left-turn movement slip ramp Coolock from Dundaniel Rd Aulden interchange Grange Castletimon Rd Junction traffic volumes per hour 2,500+ 2,000-2,499 Shantalla Rd 1,500-1,999 1,000-1,499 500-999 Less than 500
Based on 2011 CSO Census Data, the following are average commuting statistics for residents in the area. • 59% of population have a commuting trip to work, school or college. • 46% depart between 8am and 9am Proposed (peak hour for departing trips) Development Site • 41% commuting trips are car/van drivers (not including car passengers = 18%) • 37% commute by walk, cycle or public transport Relatively positive results considering limited public transport accessibility.
Proposed Development
Development Quantum Traffic study based on development of 655 residential units and retail as follows • 128 houses • 88 duplex • 439 apartments • 1000sqm of neighbourhood retail Phasing Lot 1B,2,3,4,5 access (Phase 3) Three phases of development considered from a transport perspective, each with phase have different access arrangements Phase 1 – Lot 1A Lot 1B Access Phase 2 – Lot 1B (Phase 2 only ) Phase 3 – Lot 2, 3, 4 & 5 Lot 1A Access (all phases)
Traffic Impact
Trip Generation, Distribution and Assignment Person trip rates generated for each land use Person Trip • House/Duplex Generation • Apartment • Senior Citizen Units • Car Driver Retail Mode Share Overall car driver mode share of 50% applied to residential units and 30% applied to neighbourhood retail Trip Distribution Car trips calculated by applying mode share to person trips Car trips distributed in four main directions Trip Assignment Car trips assigned to road network based on distribution and access arrangements
• Morning period of 8-9 generates the Lot No. Unit 0800-0900 1700-1800 peak number of car trips (73 in and 220 Entry Exit Entry Exit out) Lot 1A 76 units 7 39 16 8 • Considerably lower amount of car trips Lot 1B 152 units 17 74 32 15 in the evening peak hour of 17-18 as trips are distributed throughout the Lot 2 147 units 12 29 22 9 evening. (residential) Lot 2 1,000 sqm 19 16 26 22 • House/duplex type of units generate a (commercial) higher volume of trips than apartments Lot 3 88 units 4 13 10 3 at peak times. Senior citizen units Lot 4 88 units 7 22 16 5 generate very few trips. • Lot 5 104 units 8 26 19 5 Lot 1A expected to generate low amount of car trips Total 73 220 143 67 • Traffic volumes similar to that generated from Woodlawn Estate to the north, when the quantity and type of residential units along with the retail element considered. Car Trips Generated
Trip Distribution and Mode Share
Lot 1A Trip Assignment (all phases)
Lot 1B Trip Assignment (Phase 2 only)
Lot 1B, 2, 3, 4, 5 Trip Assignment (Phase 3)
Phase 1 – max. increase of c.34 car trips (two-way) in the morning peak hour. Fig Ref. 1. Lorcan Crescent 3. Lorcan Avenue 4. Castletimon Road 5. Dundaniel Road 6. Coolock Lane Phase 2 – max. increase of c.100 car trips in the morning peak hour. Fig Ref. 4. Castletimon Road 5. Dundaniel Road 6. Coolock Lane Phase 3 – max. increase of c. 218 car trips (Coolock Lane) with the max. increase on any residential link c.67 car trips (two-way). Fig. Ref 7. Coolock Lane 3. Lorcan Avenue 4. Castletimon Road 5. Dundaniel Road
Phase 1 – max. increase of 34 car trips in the morning peak hour. Fig Ref. 6. Lorcan Crescent/Lorcan Avenue (+7%) Phase 2 – max. increase of 100 car trips in the morning peak hour. Fig Ref. 5. Dundaniel Road/Castletimon Road (+13%) 4. Dundaniel Road/Oscar Traynor Rd (+4%) Phase 3 – max. increase of 218 car trips in morning peak hour. Max. increase of 67 car trips in residential areas Fig. Ref 1. Coolock Lane interchange (+7%) 6. Lorcan Crescent/Lorcan Avenue (+15%)
Woodlawn Avenue / Coolock Lane • Already over capacity in mornings with large queues back to Coolock Lane interchange and beyond • Some slight increase in queuing at this junction expected in the AM peak hour • New junction to the west will likely relocate queues from the west slightly Dundaniel Rd / Oscar Traynor Rd • Close to capacity already, with queuing for right-turn movement • Queues will increase slightly on all arms with development (c.4-6 veh’s ) • New junction to the west will likely relocate queues from the west slightly New Development junction • Close to capacity in full development scenario • Queues of 32 vehs on eastbound approach • This will add to existing queues, extending from Woodlawn Avenue junction, through this junction back to Coolock Lane interchange and beyond
BRT
Swords/Airport to City Centre Bus Rapid Transit • Proposed service would operate between Swords and Dublin Airport to the south City Centre (via Drumcondra). • Frequency of every 4minutes at peak times. • Current alignment shows southbound route only through the development. • DCC has engaged with the NTA and agreed in principle that a stop may be located immediately adjacent to the development. • Stops to the north (Coolock Lane, west of interchange) and south (N1, near Shantalla Road) but not in the development area itself. • Approximately 10-12 minute walk to the stop from centre of the development. • Need to improve pedestrian crossing facilities at Coolock Lane interchange in particular. • Scheme would have potential to decrease the number of car trips to and from the development, in particular trips to the City Centre, Dublin Airport and Swords.
Junction Design Options
Proposed new junction concept layout New signalised junction off Oscar Traynor Road proposed to provide access to the development. The key features of the junction are: • A three-arm signalised junction; • Provision of a right-turn lane on Oscar Traynor Road with capacity for eight vehicles (could be extended); • Pedestrian crossings on the eastern arm (two stage crossing) and the southern arm (single stage crossing) integrated into junction
Alternative vehicular access arrangements Access via Astro Park Access Road Advantages • Use of existing road infrastructure • Reduced impact on Coolock Lane • Queuing is further away from Coolock lane interchange Disadvantages • Potential conflicts between vehicles and vulnerable pedestrians walking to and from the Gaelscoil. • Land ownership issues
Alternative vehicular access arrangements Access to Astro Park and Gaelscoil via Development Advantages • Reduced impact on Coolock Lane • Bus priority (westbound) at junction of Woodlawn Avenue • Potential for attractive public realm and entrance to school • Potential for longer right-turn lane on Coolock Lane Disadvantages • Potential conflicts between vehicles and vulnerable pedestrians walking to and from the Gaelscoil. • Potential impact on Coolock Lane interchange • Land ownership issues
External pedestrian improvements • Improved access to Santry (employment, retail, public transport) Pedestrian improvements to roundabout/bridge Improvements to pedestrian link to Santry employment at Clonshaugh Potential new pedestrian bridge directly from development Pedestrian improvements on Swords Rd bridge/interchange
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