What is the fundamental speed law in Massachusetts?

The fundamental speed law in Massachusetts emphasizes that drivers must adjust their speed according to current conditions, regardless of the posted speed limit. This means that while there are speed limits posted on signs, those limits serve as a guideline rather than a strict requirement under all circumstances. For example, it may be necessary to drive below the posted speed limit in conditions such as heavy rain, fog, ice, or heavy traffic, where safety is a primary concern.

This law is designed to ensure that all drivers maintain a safe and reasonable speed that reflects the road, traffic, and weather conditions. It embodies the principle that safe driving goes beyond simply adhering to signs; it requires drivers to be attentive to their environment and adjust their speed accordingly to prevent accidents and ensure the safety of all road users. Thus, the requirement to adapt your speed to conditions is a key aspect of responsible driving in Massachusetts.