Final answer:
The speed limit on two-lane undivided highways can vary depending on the location and jurisdiction. In the United States, the default speed limit on rural two-lane undivided highways is typically 55 miles per hour (mph) or 88 kilometers per hour (km/h).
Step-by-step explanation:
The speed limit on two-lane undivided highways can vary depending on the location and jurisdiction. In the United States, the default speed limit on rural two-lane undivided highways is typically 55 miles per hour (mph) or 88 kilometers per hour (km/h). However, some states may set a higher or lower speed limit based on factors such as road conditions and population density. It is important to check the local regulations and signage for the specific speed limit on a particular highway.