I suggest people planning an early or late start for games, print off the Albion regulations I posted below and carry it with their season tickets.
http://www.seagulls.co.uk/documents/travel-guide-nov14229-2090058.pdf
I always understood it to be 2 hours before and after games, but where I got that from I am not sure.
Edit: Just found this on the official site
Free Travel Services
Brighton and Hove Albion FC offer home and away fans free
travel on buses and trains within the Free Travel Zone (Details
within...