Camden Community Alliance president Pieter Versluis said he was "enthused" by the large crowd that turned out for a "monster rally" in Camden on Sunday morning.
Mr Versluis estimated about 1000 people attended the protest at the Camden Showground calling on the council to impose a moratorium on the changes which include traffic lights at the intersection on Argyle and Oxley streets.
He called on the crowd to "make sure council understands that a gathering of this number of people is very meaningful".
Macarthur resident and former Labor opposition leader Mark Latham asked where was the "big need for big changes" and said the proposed decked carpark on Oxley Street was a "waste of money".
Councillor Eva Campbell said "democracy is threatened by people concerned for themselves."
Read the full story in Wednesday's Advertiser.