Final answer:
The state speed limit for automobiles in urban districts is generally about 60 km/hr or 37 mph. Pedestrians should be able to cover at least 4 meters before a car traveling at this limit reaches them. Drivers must be aware of speed limits to avoid penalties and know how to calculate deceleration if they are over the limit.
Step-by-step explanation:
The state speed limit for automobiles in urban districts is typically lower than on highways or rural areas to accommodate for increased pedestrian and vehicular traffic. According to the provided reference, in towns and cities, the speed limit is 60 km/hr (which is equivalent to approximately 37 mph). To ensure pedestrian safety, it's important to be able to cross the road swiftly enough. To cross safely, you should be able to walk at least 2 meters further than the width of the car (4 meters in total) before the car reaches you. Considering the average car width of 2 meters, this means needing to cover at least 4 meters in the time it would take a car traveling at the speed limit to cover the same distance.
In the context of a driver realizing they are exceeding the speed limit and needing to decelerate, this can involve calculations of necessary deceleration to avoid penalties. For example, if a car is traveling at 25 m/s and needs to reduce speed to the municipal limit of 16.6 m/s (approximately 60 km/hr), the driver needs to calculate the necessary deceleration to do so before reaching a speed check point, such as a speed trap 100 meters away.