Like RD, I've seen it done any number of ways over the years - including the days of the "step-over" pads - because you were never sure if they were clean or contaminated.
I agree with RD in that if the row of trash receptacles leading up to the big yellow and magenta pad on the floor where the only opening in the rad rope exists isn't a give-away for the workers, you probably have larger issues.
It might take a little while to acclimate the workers to the "new way", but it shouldn't be a problem. It aslo avoids the constant problem of RP getting nailed for the signs not being replaced by the workers.