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Because speed bump design varies greatly; many are very hard on your vehicle to go over at very low speeds, the size/shape of the bump has nothing to do with th
by rconti 9y ago
Because speed bump design varies greatly; many are very hard on your vehicle to go over at very low speeds, the size/shape of the bump has nothing to do with the speed limit, it seems. Often I need to go 5mph over a speed bump in a 25mph zone. It's bad for everyone. Wear and tear, noise pollution, brake dust+emissions pollution from speeding up and slowing down, etc.
Sometimes there are big long speed bumps that are actually MORE comfortable to take at higher-than-legal speeds. And it's encouraged an arms race in vehicles in the US; it undoubtedly influences people to buy bigger/heavier/taller vehicles with longer-travel suspension.
- lloeki 9y agoSome square speed bumps have a square form factor, wedge shaped sides over here so that if you aim with the bump right in the middle of the car, sufficiently wide-tracked wheels are on each side, negating the bump, presumably for emergency vehicles and buses to not be concerned with the bump. Obviously obnoxious SUVs and the like are impervious to this, obliviously driving over. Conversely, a chat with my local mechanic turned up an issue with unprotected engine underside (like with most cheap to mid-range cars) means there's a sufficiently higher chance to rip the oil drain plug, meaning slightly increased tow-in rates with each new speed bump. Nasty, although more recent cars have undersides now in an effort to reduce drag and improve compliance with emission regulations.