Unless otherwise posted, what is the maximum speed limit on 2-lane highways outside of built-up areas?

Answer: D — 80 km/h

On 2-lane highways outside of built-up areas in Ontario, the maximum speed limit is indeed set at 80 km/h unless otherwise indicated by posted signs. This regulation is designed to ensure safe travel on highways that may have varying conditions, such as less frequent traffic, potential wildlife crossings, and changes in road conditions that could impact speed. By establishing a maximum limit of 80 km/h, the law provides a balance between allowing for efficient travel while also taking into account the safety of all road users. This helps minimize the risks often associated with higher speeds in less populated or rural areas, promoting safer riding practices for motorcyclists and other drivers.