The responsibility of an elder to keep from walking through an area where others will have to rise to show respect, where avoidable: Kiddushin 32b, 33a, 33b
The reward for the above: Megillah 27b; Kiddushin 33a
Not burdening others, even where the cost of not doing so will be the loss of one's own Mitzvah: Megillah 22b
