Maybe - maybe not mate. You ever driven along that stretch ? It's a feckin' nightmare for cameras.............and eight per gantry is feasible seeing as there's 4 lanes and on that stretch (which to drive must take about 10-15 minutes depending on the variable traffic speeds) you easily pass under 12 gantry's..............

So maybe a joke, but knowing that road I'd be more inclined to believe it.