Jimmy, always look behind you regularly when you're walking,... these days the main and very common danger to pedestrians seems to be loons who ride bicycles illegally on the pavements,... and at full speed,... and they
never seem to use a bell or any other kind of audible warning. !
One of my neighbours can walk, but with difficulty, she uses an electrically powered disabled buggy, that can be used on the pavement, and also,... I think ?,... on the roads !,... battery operated and rechargeable,... she uses it to go shopping at quite a distance, and I was amazed when she told me that it has a range of 30 miles or similar !,... it goes quite fast as well.
e.g. http://www.mobilityscooterbelfast.co.uk/http://www.mobilityscooterbelfast.co.uk/images/gallery/mobsc6.jpg