Speed limits in special zones

Rule: The speed limit for residential areas, near schools, hospitals etc is 25 kph, even if not marked.

Traffic Logic: Such areas have many pedestrians, especially small children who do not know the dangers of the road. Children do not notice vehicles while playing. Children are 2-3 times slower than adults to react to a horn, and may run the wrong way. There are also pets in residential areas, which can jump in the path of a car. Near hospitals, there may be invalids who cannot move fast. A vehicle should be able to stop instantly in these cases. 

With maximum braking, your car can stop within 4 metres from 25 kph. To stop within 1 m, stay below 13 kph. This is why many school areas have a posted speed limit of 15 kph.

Driving hints: To help you stay below the legal 25 kph, stay in 3rd gear or, better, in 2nd gear. If you speed up unconsciously, the increased engine revolutions will help to warn you.