Homer Watson and Ottawa Three Lane Roundabouts

[Coke6pk]

I know there was rampant discussion here about the overhead signage, and the wind flaps (NOT lights) on the signs.

I just came back from London, and there are two signs (mounted only on one side) approaching Veterans Memorial Parkway. The smaller of the two signs is right at the ramp, and has these same wind shields. The sign before the intersection is much larger, and is mounted across 3 lanes of traffic (but mounted just on one side), but has none of those wings. Any idea why?

Coke