As you suggest, the 'No Motor Vehicle' signs at the north end of TGT are quite a way down the road and not properly visible until you're well round the corner. Also, as others have suggested, the advance 'No Left Turn' sign in Bath Road is easily obscured by buses. They need to make all this a lot more obvious so regular drivers notice that things have changed. For a start they could easily remove the mini-roundabout, as there's no need for it as 'all traffic' should now be turning right out of Bath Road. Then draw some new white lines and a few big arrows on the road showing the way to go, and reposition the 'No Motor Vehicle' signs further forward. Similarly at the southern end, the existing arrows on the road that suggest you can turn into TGT from CHR need to be replaced with some big 'straight on' arrows across the end of the junction. None of these changes would cost much and they're sufficiently cosmetic for things to be easily put back as they were when the 'experiment' is over. To add a few small signs to the existing road layout here does seem somewhat inadequate, and only lends credence to the idea that this is a money making scheme rather than an honest attempt to improve conditions for pedestrians in TGT during the present crisis.
Peter Evans ● 2303d