Characteristics associated with willingness to walk further than necessary to the bus stop: Insights for public transport-related physical activity

•Half of bus users were willing to walk further to the bus stop if frequency was improved.•Various characteristics were associated with willingness to walk further to bus stops.•Younger people were more willing to walk further to bus stops than older people.•Some groups may be more amenable to strategies to increase public transport-related physical activity.•Improving bus service frequency may increase public transport-related physical activity and confer health benefits.