3. Introduction

**Table i: Traffic and passenger numbers in Scotland, 2012 to 2017**
	2012	2016	2017	% change over 1 year	% change over 5 years
Car traffic (m/veh km) on all roads ^&	33,777	35,362	36,206	2.4%	7.2%
Pedal cycles (m/veh km) on all roads ^&	310	288	290	0.7%	-6.5%
ScotRail passengers (millions)^$	83.3	94.2	97.8	3.8%	17.4%
Bus passengers (millions)^$	420	393	380*	-3.3*%	-9.5*%
Air passengers (millions)	22.2	26.9	28.9	7.1%	29.8%
Ferry passengers in Scotland (millions^)#	7.89	8.32	8.36	0.4%	5.9%

Sources: DfT, ORR, CAA, ferry operators (Not all National Statistics)

Notes: ^$ Based on financial year, *provisional figures, ^# Does not include figures for passenger numbers on the Corran ferry service, ^&traffic estimates indicate the broad level of traffic, so year-on-year comparisons should be made with caution as they are estimated based on a small cross-section of Scottish roads, particularly for cycle traffic.

*The 2017 bus passenger figure is provisional.

This bulletin provides the results of the Transport and travel related questions asked in the Scottish Household Survey (SHS), including information from the travel diary, and uses data from a range of other sources to provide some context around transport and travel in Scotland.

The Travel Diary is a component of the survey which involves respondents recounting details of all the journeys they made the previous day. A journey can consist of one or more stages. A new stage is defined when there is a change in the form of transport or when there is a change of vehicle requiring a separate ticket.

Non-transport-related SHS results and methodological information for the survey can be found on the SHS web pages.

In order to maximise the utility of the data, most tables in Transport and Travel in Scotland (TATIS) provide estimates for single years where possible. Care should be taken when using estimates with lower sample sizes. A lookup table for confidence intervals is included (Table A), which can be used in conjunction with the estimates and sample size to give an indication of what inferences can reliably be made from the data. In some cases, where the sample size would be below 50 respondents, years have been combined or estimates suppressed.

Data sources are listed in Section 9 of this publication. Further explanation of definitions can be found in the relevant topic chapters of Scottish Transport Statistics:

https://www.transport.gov.scot/publication/scottish-transport-statistics-no-36-2017-edition/

Scottish Transport Statistics will be published in February 2019 and will contain a comprehensive statistical picture of transport statistics in Scotland. For a full list of transport statistics publications see: https://www.transport.gov.scot/our-approach/statistics/#

Keith Hoy
Transport Analytical Services
Transport Scotland
Victoria Quay
Edinburgh EH6 6QQ
Telephone: 0131 244 3004
transtat@transport.gov.scot