In the article from Salisbury FC it suggests that;
There is also a bus service from the City centre, the No. 11 to the
park and ride near the ground. The bus runs every 15 minutes. Timetable
here: http://assets.goaheadbus.com/media/cms_page_media/2078/Beehive%20p&r11.pdf
There will be traffic. Please be patient before and after the game.
However it's suggested by a Hereford supporter that:
The stop to get off for the P11 bus is the TA centre, Old Sarum, not the Beehive. 3 minute walk from there.
The bus runs from just below Tesco's in the town centre.