DfT 2005 Bracknell Forest.

Methods	Design: Controlled before‐after study Duration of follow‐up: Minimum of 6 months, maximum of 9 months post‐intervention (varies between schools, depending on intervention start date)
Participants	Country: United Kingdom Setting: Urban primary schools Intervention group: 3 schools, 828 baseline responses Control group: 15 schools, 3043 baseline responses Age: primary schoolchildren. Gender not reported
Interventions	School travel advisors appointed to work with schools to develop school travel plans School travel advisors also do other work that contribute to reducing congestion and increasing sustainable travel. Capital grants made available for some school travel plans Duration of intervention: 6‐9 months (varies between schools, depending on intervention start date)
Outcomes	Travel mode: ‐ How pupils travelled to school every day for one week (averaged) ‐ % of pupils travelling by car, walking, cycling, using other travel mode. Effects on inequalities not reported. Adverse effects not reported.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	High risk	Not randomised
Allocation concealment?	High risk	Not randomised
Blinding? All outcomes	High risk	Blinding not feasible. Could have influenced outcomes.
Incomplete outcome data addressed? All outcomes	High risk	57% of eligible schools provided results at both baseline and follow‐up: a substantial amount of incomplete outcome data. Some school results removed due to 'cleaning the data'. No matching of individual participants in baseline and follow‐up samples, so not possible to fully assess the extent to which incomplete outcome data may have led to bias in the results
Free of selective reporting?	Unclear risk	Not clear that all pre‐specified outcomes were included
Free of other bias?	Low risk	No other sources of bias identified
Adequate matching of intervention / control groups?	Unclear risk	Selected schools were those with suitable data. Intervention and control schools were in same region. Travel mode at baseline similar for intervention and control schools.