Until the 8th September, access to the park will be by other means. The council has Tweeted the map below.
They are suggesting using the entrance to the park near the castle, but if you normally cross North Road to access the University or the Civic Centre, I’d suggest using Colum Road by taking the Talybont path towards the ambulance station. Colum Road has some traffic calming and those wide but advisory cycle lanes.
If it is the centre of town you are heading for, perhaps stay on the Taff Trail for a few more miles and cross the Taff at Castle Street or Wood Street. It isn’t ideal, but it’s only for a few days.