1. JOURNEY TIME MODELLING
Peter Cranny – Dublin Transportation Office
O’Callaghan Alexander Hotel 25th June 2009
In the GDA
JOURNEY TIME MODELLING
Modelling the effects of transport strategies on journey time

2. Transport Strategy for the Greater Dublin Area 2010 – 2030
The Dublin Transportation Office (dto) is required to maintain an up- to-date transport strategy for the GDA, which is to be reviewed and updated at least once in every five years. The new Transport Strategy, which is the successor to A Platform for Change, is currently being developed. It is the aim of the DTO to have both the new Strategy and subsequent implementation adopted by Government in 2010
Dublin Transportation Study
Dublin Transportation Initiative – 1995
A Platform For Change
Transport Strategy For The GDA

3. Consultation for The Transport Strategy 2010 – 2030
STAKEHOLDERS The DTO assembled a list of stakeholders that were then formed into three consultative panels:
Strategic Stakeholders: Business and community members (i.e. non- DTO agencies and Secretaries General of Government Departments);
Oireachtas Panel: Members of Dail Eireann and Seanad Eireann based in the GDA;
Regional Planning Authorities Panel: Members of the GDA regional planning authorities.
PUBLIC CONSULTATION WEBSITE

4. Vision & Objectives of the Strategy 2010 – 2030
VISION “a competitive, vibrant, city-region of inclusive and engaged communities,
proud of its heritage and its national and European roles,
looking to the future, where an improved quality of life for all is guided by the principle of sustainability”
OBJECTIVES
To strengthen communities
To reduce stress
To improve accessibility
To respect the natural environment
To improve economic competitiveness
To improve governance
To improve attractiveness of the public realm

5. Public Consultation

6. Journey Time modelling

7. GIS for Journey Time Modelling
accession
Works best with TranXchange or ATCO.cif format PT schedule data Very useful at Local Authority level Very useful for looking at current situations Check accessibility to food shops, Libraries, etc. by public transport, walking, cycling & driving Used extensively in preparing Local Area Plans in UK *commissioned by DFT UK
GIS for Journey Time Modelling

8. GIS for Journey Time Modelling
GIS used in the dto strategy for analysing journey time
Uses unweighted journey time derived from the generalised cost of travel from a TRIPS Model in a CUBE environment. More useful at Regional (GDA) Level Useful for comparing Base Year with Strategy Scenarios of new PT services/Changes in Land Use/Roads/Permeability
GIS for Journey Time Modelling

9. Components of the dto journey time tool
Core datasets
ARCMAP
Least Cost Journey Analyst
Spatial Analyst
Network Analyst
CORE DATA
Road network topology with added walking only routes
Bus stop (generalised) and rail stop locations – known as PT nodes
Journey times to destinations from PT nodes
Population at 250 m centres derived from….
CSO population data at DED level
Geodirectory
GIS APPLICATION

10. Core Data for Journey Time Modelling
Road network topology with added walking only routes
14 mins PT Time
23 mins PT Time
18.7 mins PT Time
PT access nodes with travel Time values to destination
Origins (incidents) generated at 50m intervals on the footpath network
Journey time modelling application finds the least cost path to destination for each origin
Core Data for Journey Time Modelling

11. Interpolation and adding population data
idw interpolation to create journey time polygons
IDW Interpolation to grid
Add population centroids
Spatial query – Select by location. (This is the 21 – 30 minute timeband)
Summarise to get population count
Interpolation and adding population data
Journey time modelling application finds the least cost path to destination for each origin

12. % Population of GDA within 30 & 60 mins

13. Average Journey Time to 7 destinations
Swords Liffey Valley Tallaght Stephen’s Green Dundrum Dun Laoghaire Bray
Average Journey Time to 7 destinations

14. Conclusion Employment POWCAR (place of work – CSO 2006)
Employment centres
Using the journey time data with other spatial data
In the 2010 strategy
Employment
POWCAR (place of work – CSO 2006)
Social Deprivation
Education
PT networks & capacity
Congestion
County Development Plans
Regional Planning Guidelines SEA related datasets
11/8/2018
Peter Cranny - Dublin Transportation Office Compass O’Callaghan Alexander Hotel 25th June 2009

15. I?
11/8/2018
Peter Cranny - Dublin Transportation Office Compass O’Callaghan Alexander Hotel 25th June 2009