"Reasonable caution" means being careful and thoughtful while considering the risks and potential outcomes of a situation. It involves making responsible decisions and taking necessary precautions to avoid harm or mistakes. Full definition
A duty of care is an obligation to exercise reasonable caution in order to avoid a foreseeable risk of harm. (personalinjurylawyersbirmingham.com)
The right of way, however, is not absolute, and pedestrians must always use reasonable caution. (bwglaw.com)
The court asks: would the facts available to the officer at the moment of the search warrant a man of reasonable caution in the belief that the action taken was appropriate? (law.stackexchange.com)