Some Bus Éireann timetables have certain stops marked with a "P".
For example, the current Route 51 Galway - Cork regional bus timetable has a stop at GMIT / ATU on the Dublin Road, which is labelled "P" on all services.
This means that the stop is "pick-up only", that is, people can get on the bus here, but cannot(*) get off.
Usually this "pick-up only" rule is used because there is another local bus which makes more sense for people travelling from the previous bus-stop to this one, and it is best that regional buses are not slowed down by loading and unloading short-journey passengers who have other options.
In the example above, there are several Galway city buses (routes 409, 402, and 410) which are good for travelling between the city centre and GMIT/ATU in the Dublin Road.
(*) It is unlikely that the bus driver will stop you, if you really want to get off the bus at one of these tops, for example if you feel sick or have found out that you should not continue with your journey. But they will not sell you a ticket which is "to" one of these stops, and the coach will only stop at them if there is someone who is waiting to get on.
