I can provide some guidance based on general principles and legal considerations.
In most jurisdictions, traffic laws and speed limits apply regardless of the number of vehicles on the road. The purpose of speed limits is to promote safety and reduce the risk of accidents. Even if you are the only car on the road, it is generally advisable to obey the speed limit to ensure your own safety and the safety of others.
There may be situations where there are no specific speed limit signs, such as on private property or certain rural roads. In such cases, it is still important to drive at a safe and reasonable speed, taking into account factors like road conditions, visibility, and any potential hazards.
It's important to note that traffic laws and regulations can vary by jurisdiction, so it's always a good idea to familiarize yourself with the specific laws and guidelines in your area. If you have any doubts or questions about speed limits, it's best to consult local traffic laws or seek advice from local authorities.