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MonctonRad is the Champlain Place intersection technically a rotary? I've driven that a couple of times and I seem to remember the people entering the circle having the right-of-way. The circle just seems to large to be considered safe. With two highway approaches the travel speed should be ~50km/h and not the speeding that could currently be done.
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Not to hijack this thread but.....
The roundabout at Hall's Creek (Champlain Place) is referred to by the locals as a "traffic circle". It probably is not a traditional roundabout in that the entering speed is typically 70-80 km/hr and the circle is 2-3 lanes wide. If you enter the traffic circle from Veteran's Highway, the outside lane leads directly to Wheeler Blvd and you don't have to yield right of way. The inside lane however merges into the middle lane on the roundabout and yielding is mandatory. It doesn't take too long to get used to it, but I imagine the traffic flow drives the tourists crazy!
I think there are lots of variations to roundabout design. The "magic roundabout" in Swindon, England is legendary.
I remember coming across a roundabout in Scotland once, near Edinburgh, where the circle was at the confluence of two major high speed divided motorways!

I think I lost a couple of my nine lives driving through that one!
The new roundabout proposed for the Killam/Collishaw/Russ Howard intersection in Moncton will have five entries. I don't think they have decided yet if it will have one or two lanes....