<rant>
Roundabouts with traffic lights every 3 metres…if you want traffic lights build a crossroads, it costs less, drains water better, easier to design and maintain, less prone to jams because some muppet can’t see the yellow box, aaaargh!
Mini roundabouts…universally ignored except by those that haven’t a clue and just stop and look at everyone else. Who also stop because someone is on their right, aaaaaargh!
Stop signs at junctions. Pointless, giving way is quite adequate, thanks
</rant>