Quote by Eamonn
Surely a pay as you enter barrier would be the most cost effective. If you're beyond the barrier you've paid. Need little or no enforcement and an electronic payment by contactless payment (tap) means no one has to empty it.
Makes sense to me
Unfortunately, the layout of the area and the need for free access to the car parking section and for tour coaches serving cruise liners make a pay as you enter barrier system impractical.