National Travel Survey Maureen Delamere

Transcript:National Travel Survey Maureen Delamere:
National Travel Survey Maureen Delamere Statistician – QNHS Analysis and Social Modules Central Statistics Office National Travel Survey (NTS) Module of QNHS Quarter 4 2009, 2012, 2013 and 2014 On travel behaviour of respondents One of most comprehensive household studies of travel patterns ever to be conducted within the State In 2014, detailed information on travel collected from 10,382 respondents comprising 18,031 journeys NTS continued CAPI interviewing – on waves 2 to 4 of QNHS sample The information collected included the following: number of journeys made reason for journey mode of transport used duration of each journey distance travelled Only travel within the island of Ireland, made by residents of the State NTS continued 2011 Census of Population POWCAR (Place Of Work Census of Anonymised Records) POWCAR - definitive source of data on travel to work, school and college NTS results – are for a particular quarter - may not be fully representative of the year as a whole Care should be taken when interpreting the results, especially if extrapolating to annualised results Also seasonality note of caution NTS – key definitions and descriptions Journey – one way course of travel from A toB for the purpose of carrying out a specific activity at location B. Location could be a single premise or a complex of premises Return trips recorded as separate journeys Journeys must have: Commenced in the travel reference day (but may end the following day) Been at least 100 metres in length (approx one minute walk) Comprised exclusively of domestic travel (all stages of foreign travel were excluded) Not an integral part of respondent’s routine employment Mode - where a journey consists of more than one mode of travel, the main mode of travel is the mode of travel used for greatest distance Travel reference period is 4am to 3:59am – allows capture of information for respondents who finish work or return from leisure activities after midnight Data collected over 24 hour period NTS – key definitions and descriptions (continued) Travel Reference Day To ensure that data is collected for all 7 days of the week, each participant in the NTS is assigned a selected 'travel reference day ‘- maximum of three days prior to the day of interview Wednesday through to Saturday interviews - travel reference day was the immediately preceding day Monday interviews - .30% of Monday interviews were assigned at random to the immediately