That was hilarious. I want a few of those now.
Over here they take speedbumps pretty seriously when they make them on the street. They're usually 4 or 5 inches high, and the flat section across the top is 3 to 6 feet wide. Perfect for the little Civics etc that have been wrapped in another car's worth of custom spoilers and skirts etc to get stuck on. (Saw it, it was funnier than.. well, y'know.. front wheels spinning, back wheels off the ground, both no where near pavement...)
Harley laughs when one of these folks who races and zig-zags through traffic goes by us. I'll switch to a white knuckle grip the wheel for a sec and grit my teeth and say "MUST! RECREATE! FASTER! Ahh! It's 10 minutes later than it was ten minutes ago! Ahhhhh!"
I love it when someone who would rather be speeding along at 80 kmh (in a 50 kmh zone) is frothing at the mouth in my rear view mirror because I've set my cruise control at 55 and traffic/parked cars won't let them pass.
It's the same here, if a street is signed for 50 kph (30 mph), they'll do 70 (43 mph). Where I used to live, if you got on Highway 401 (signed for 100 kmh) doing less than 120, you were 'impeding traffic' (It was so much fun having to use that road with a truckload of dangerous goods and a governor set to 107 kmh max).
The lane behind our house is pretty straight and level, but just past us it's a blind curve going uphill to the next street. Lane speed limit is supposed to be 20 kmh (just over 10 mph) and they come flying down and around that curve, or use the straightaway like they need to build up speed for the (minor) hillclimb. Our next door neighbour's back fence post is mangled because someone missed the turn coming down there. Fortunately his kids weren't in the yard, the SUV ended up almost halfway across it.
There are speedbumps in the lane, but not in our section of it, they start after the next crosslane east.
Sometimes I want to put one of those "Your Speed:" radar signs up back there, but it would probably only encourage them. After watching many seasons of "Canada's Worst Driver" I would love to have a few styrofoam cutouts that could 'dart out' from the side of the garage toward the lane.