Keep a safe distance so you can be ready to run, walk or drive away quickly.
If someone asks for directions, then tell them. Beware of giving any direct assistance.
If a stranger asks you to go with them for any reason say "No!" Go quickly to the nearest safe place where you can report any odd behaviour or phone for help.
Children should be shown safe places they can go if strangers approach them or if they are distressed in any way.