In some embodiments, techniques comprise receiving route data that includes information relating to a stop, at a portable device that is personal to a passenger on a public conveyance; determining a second destination; determining a first destination that is related to the stop, wherein the first destination is a transfer destination en route to the second destination; determining a current location of the portable device; determining, based at least in part on the current location, that the portable device has nearly reached the first destination; providing a first alert at the portable device; determining a second current location; determining that the second current location is related to the second destination; and providing a second alert.