"Our supporters have grown since we have been in the Championship and for so many to take the trouble to go to Reading is brilliant," said Johnson.
"Reading will have their home crowd behind them and it is important we make our presence felt. It is some time since Bristol City have been to the Madjeski Stadium and I hope they rock the place to its foundations.
"They will be outnumbered but they can make up for that by turning up the volume. I know it is something that gets through to the players and they appreciate it."