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SHORT OVERVIEW OF NATIONAL TRAVEL SURVEYS. 1. Auteur ou Service. M.O. Gascon, CERTU, October 2006. COST meeting, Prague. 2 décembre 2002. TYPE OF SURVEY (EU25, EU candidates, EFTA, USA, South Corea). RESPONSE RATE. %. SLOVAK REPUBLIC. LATVIA. AVERAGE NUMBER OF TRIPS/PERSON/DAY. SWEDEN.
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SHORT OVERVIEW OF NATIONAL TRAVEL SURVEYS 1 Auteur ou Service M.O. Gascon, CERTU, October 2006 COST meeting, Prague 2 décembre 2002
RESPONSE RATE % SLOVAK REPUBLIC LATVIA
AVERAGE NUMBER OF TRIPS/PERSON/DAY SWEDEN LATVIA
AVERAGE TOTAL TRAVEL DISTANCE /PERSON/DAY (MIN) SWITZERLAND LATVIA
SOME DIFFERENCES AND CONSEQUENCES IN NPTS AND LOCAL TRANSPORT SURVEYS 6 Auteur ou Service M.O. Gascon, CERTU, October 2006 COST meeting, Prague 2 décembre 2002
Sample size (for global figures) Source : survey / census Households or persons (cluster effect / two stages sampling) DIFFERENCES ON SAMPLING PROCEDURES
Age: mini 6,10 (15) / no max,74/84 Mobility for a single (previous) day or a week Long distance trips : 2 weeks, 1 month, 3 months DIFFERENCES ON SAMPLING PROCEDURES
Working day ? All days ? Continuous ? Cross sectional ? Face to face ? Telephone ? Postal ? DIFFERENCES ON SAMPLING PROCEDURES
Long distance trip = >50 km (D), >200 km (B), >80 km (F) Walking trips : all, limit on distance (45 m, UK) on duration (5’, Italy) DIFFERENCES IN DEFINITIONS 10
Mode : several ? Main mode ? (longest part of the trip,hierarchy) Trip purposes : not the same classification (3 to 13 !) DIFFERENCES IN DEFINITIONS
Additional information on certain kinds of trips : tourism, taxi drivers, rounds (postmen, doctors) Vehicle-kilometers / passenger-kilometers DIFFERENCES IN DEFINITIONS 12
Publications do not allow full comparison Modes : car (driver/passenger), motorbike/bicycle, taxis, motorised/non motorised, public/private, rail, urban/interurban DIFFERENCES IN INDICATORS
Purposes : work/education, shopping/personal business, escort, leisure (sport/culture/visit to friends and relatives), home Distance, travel time, age : different classifications DIFFERENCES IN INDICATORS
ALMOST 100 SURVEYS ON 80 URBAN AREAS, 20 IN PROJECT BEFORE 2009 FACE TO FACE IN THE MORE DENSE ZONE PHONE IN THE OUTSKIRTS FRENCH LOCAL TRAVEL SURVEYS
(more urbanised zone) Bias in the sample : Land line phone equipement is decreasing : urban area of Grenoble 2002 : 86% Students : only ½, they live in the more urbanised zone WHY NOT BY PHONE IN LOCAL TRANSPORT SURVEY 16
(more urbanised zone) Daily mobility different(Grenoble) no land line phone : 4,4 trips/pers/day, with land line phone : 4,0 more by PT (+ 0,3), more on foot (+ 0,3) and less by car (- 0,2) WHY NOT BY PHONE IN LOCAL TRANSPORT SURVEY 17
No land line phone : 7% Daily mobility less different : 3,6 , with land line phone : 3,7 Less trips out of the municipality of home : no land line phone : 1/2, with land line phone : 2/3 WHY BY PHONE IN THE OUTSKIRTS ? 18
Slight difference on global daily mobility figure if surveying only equipped households : 3,77 trips/pers/day instead of 3,72 WHY BY PHONE IN THE OUTSKIRTS ? 19