We are currently in the middle east and here they even have speed bumps on the main roads. They are big enough to slow down even the 50 tonners..

I presume you mean the 'cushion-type' ones we see in the UK which throw out the tracking if you straddle them, or quickly knacker the suspension if you [only alternative, even at slow speeds] go over them with the wheels over the centre?

The worst type of 'speed humps' I've come across are the too-high semi-circular concrete ones with no warnings, including having them painted so you can see them well before you reach them. Unless you drive at walking pace (less than 5mph), then you will almost certainly do serious damage to your suspension, wheels/tyres or all three. I have had the 'pleasure' of not realising this in my old car (mid 90s Nissan Micra) going at (what I thought was a safe low speed of) 10mph (as directed by the signs), and being lucky to get away with no serious damage - another driver doing about the same speed was not so lucky and had to have his car towed to the local garage for a repair costing several £000s, all whilst on holiday.

The rubberised newer versions aren't quite as bad, but they'll still will give the car and you an almighty jolt unless you tippy-toe over them. Watch out for both types in older car parks and trading estates (many around on ones that have old concrete road surfaces).

Some UK councils have been forced to pay for damage to cars and remedial works to humps (on roads, not in car parks) where the slopes have been more steep or the hump height has been more than regulations say, as well as poorly-maintained ones - I've seen several in St. Albans where they are, in my view, too high and the road surface has sunk before them, often resulting in vehicles grounding themselves [not just sports cars] and possibly damaging suspension parts even though they are travelling at low speed. If I recall correctly, back in the days when NuLab were 'encouraging' councils to install road humps, Barnet council in London actually took most of theirs out because of the aforemntioned issues, as well as the cost of repairs and noise/actual pollution caused by vehicles (especially HGVs) continually slowing down/going over the humps/speeding up again. As far as I know, there are no more accidents in the borough than before.