Good Lord! opening barriers and controlling access to 'secure areas' were about the only useful things I saw a scuffer do in my day. What do they do all day nowadays? Drink coffee and put witless crap of the intellectual level of the average 'Gerry Springer' participant on the interweb?
Judging from Lionel's post, traffic warden would appear to be it. Hardly Inspector Morse ... but then, I'm just a thicko!