What is the speed limit just outside a thickly settled district?

The speed limit just outside a thickly settled district in Massachusetts is indeed 55 mph. This speed limit is established to ensure a balance between safety and mobility, taking into consideration that as a vehicle moves away from residential or densely populated areas, it is generally safer to travel at higher speeds. In thickly settled districts, speed limits are lowered to protect pedestrians and reduce the risk of accidents, but once outside those areas, drivers can resume higher speeds, as long as they are within the legal limit.

While the other options represent different speed limits that may apply in various circumstances, the standard speed limit increases to 55 mph when leaving a thickly settled district where residential density decreases, and there is a reduced likelihood of pedestrian activity. Understanding these distinctions is crucial for safe driving practices and following local traffic regulations.