Final answer:
Drivers are expected to adhere to speed limits at all times for safe driving. Instruction to exceed speed limits typically only applies to authorized emergency vehicles in certain jurisdictions. Speeding violations can result in penalties, and there's a small margin of error allowed for speedometer inaccuracies.
Step-by-step explanation:
The original question presented appears to be a misunderstanding as it refers to a 'Control Tower' directing a driver to expedite, which suggests an aviation context. However, if we assume the scenario relates to traffic law and the question is whether a driver is allowed to exceed the speed limit if instructed by a traffic control authority, it is important to note that speed limits are enforced by law and any instruction to exceed these limits would typically only come from an emergency service vehicle in certain jurisdictions. Typically, only authorized emergency vehicles may exceed speed limits when necessary, and ordinary drivers are expected to adhere to speed limits at all times to maintain safe driving conditions.
Speeding tickets and traffic enforcement often allow for a small margin of error due to inaccuracies in speedometer readings, but consistently driving over the speed limit can result in penalties. It's crucial to maintain safe driving practices and abide by speed regulations unless given a direct and lawful instruction during an emergency situation. In all non-emergency scenarios, drivers should adhere to speed limits to ensure road safety and avoid speeding violations.