To an American it looks painfully small and slow for coming off a highway and would be overwhelmed often with cars and semi-truck traffic. One semi-truck would

To an American it looks painfully small and slow for coming off a highway and would be overwhelmed often with cars and semi-truck traffic. One semi-truck would stop an entire circles worth of cars with its ass end swinging in and out. And highway travellers are going to be gun shy and not respond as quickly to gaps in the circle after doing 75+mph for an hour or more.