The council has said it issued 800 fines to drivers using Kings Park as a shortcut while Ashley Road bridge is closed for repairs.
The fines of £60 each were issued in the space of a week and some motorists used the route up to four times a day, collecting multiple tickets.
Bournemouth Borough Council's environment and transport councillor, Robert Lawton, said: "I am very concerned that despite our numerous attempts to advise and warn motorists, people are continuing to drive through the park.
"We don’t want to be in this situation and therefore we have taken every possible measure to inform people that they are not allowed to drive through Kings Park.
"The correct signage is in place warning people that only buses are allowed through the park and our officers were onsite for two weeks advising people of the correct diversions.
"We also allowed a period of time when we only issued warning letters to motorists before we informed people last week that we would be issuing penalty charge notices.
"Again I would like to urge motorists to use the correct diversionary routes and not drive through Kings Park as they do risk a penalty charge notice. The camera does not flash so drivers may think that they are getting away with it."