@Jacomina....I was a distribution clerk at Hilo Post Office assorting mail.  I also worked in the mark up section...forwarding and undeliverable mail.    Altho I have not seen anyone delivering mail with a bicycle here in Hawaii before, I think its a good idea.  Drop everyone at the top of the hill and let them work downwards.....With the hard times the post office is having, they should think about it....I had suggested this before.    Aloha