Transcript NRA Transportation Surveys 2011

NRA Transportation Surveys
Derek Brady & Nigel O’Neill, July
2011
NRA activities generating
Transportation Surveys
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Roads Projects
National Roads Traffic Management Study
National Secondary Roads Needs Study.
NRA Project Appraisal Guidelines (PAG).
NRA National Traffic Model
NRA Automatic Traffic Counter Network
Local Authority Transportation Surveys
for National Road Schemes
• O/D & Count Surveys are carried out for Local
Authorities who are the client for almost all road
schemes on National Roads
• Collection, storage and quality control of survey
information is with individual Local Authorities
• Probably will not be significant volumes of survey
information acquired through this means in the near
future.
• PAG (incorporating DoT’s CAF 2009) Appraisal
deliverables are the “transportation interface”
between L.A.s and NRA. This includes Transportation
Modelling Reports, CBA & Business Case material.
Dunkettle Junction Improvement
• NRA is Contracting Authority
• Initial intention to collect February 2011 origin
destination data by Road Side Interview (RSI)
• An Garda Síochána unable to facilitate
roadside surveys
• Revised survey approach: postcards were
handed out to drivers stopped at signalised
junctions
• Low number of survey samples returned
NRA Transportation Study Surveys
• NRA NTM. Collected significant volume of RSI,
Count data, Journey Time info in 2006/2007.
• NSRNS. Collected further Count data/Journey
Time data to validate NTM for Study in 2009.
Also utilised 2005 GPS data to establish
Journey Times.
• NRTMS. Collected counts/speeds/reg.-plate
matching to develop M50 and radial models
for traffic management.
Cycling Surveys 2010
• Original motivation: Need to appraise cycling and walking facilities
proposed as general improvement to National Secondary Roads
• Wanted to predict demand based upon simple household
characteristics (from An Post’s GEODirectory) and not rely on an
estimate of incremental change on existing demand.
• For CBA, alongside health and absenteeism benefits, needed to
quantify the users’ perception of reduced danger – journey
ambience.
• Survey data was collected from three different locations
(Greystones, Passage West & Tullamore). A questionnaire was used
to carry out both household surveys and intercept surveys on the
walking and cycling facilities themselves.
NRA Traffic Count Infrastructure
• Ownership and Management of ATC
infrastructure with the NRA
• Tender competition currently underway for
significant upgrading and expansion of ATC
network.
• NRA ATC data has been posted on NRA
website for almost 10 years and will continue
to be made available publicly.