Final answer:
The maximum speed limit for ideal driving conditions is the posted speed limit, but actual safe driving speed may vary depending on road and environmental conditions as well as the necessary aid of friction between the tires and the road.
Step-by-step explanation:
The maximum speed limit for ideal driving conditions is the posted speed. This is the speed limit that is legally set and displayed on road signs for a particular area or road. However, it is important to remember that the ideal speed can vary depending on various factors such as weather, road, and traffic conditions. For instance, if the road is wet or icy, it may be safer to drive below the posted speed. Furthermore, one must also consider the aid of friction between the tires and the road, which plays a crucial role in a vehicle's ability to turn on a curve safely without sliding.
Regarding speed limits in different scenarios, in towns and cities the typical speed limit might be 60 km/h, and considerations of a car's dimensions come into play for pedestrian safety when crossing the road. Additionally, it's important to understand that the speed at which the police are likely to enforce the limit (de facto speed limit) may differ slightly from the de jure speed limit displayed on signs.
When driving, you must not only adhere to the posted speed limit but also drive at a speed that suits the current driving conditions to ensure safety for everyone on the road.