What is the maximum speed limit on a 2-lane undivided highway in California unless otherwise posted?

The maximum speed limit on a 2-lane undivided highway in California, unless otherwise posted, is indeed 55 mph. This limit is established to ensure safety on roads that may not have the same design features as multi-lane highways. Undivided highways often have more abrupt changes in traffic, such as crossing traffic or pedestrians, and a lower speed limit helps to reduce the likelihood of accidents.

Additionally, while some highways do allow for higher speed limits of 65 mph or even 70 mph, those are typically found on wider, multi-lane divided highways or freeways where traffic is better managed, allowing vehicles to travel safely at higher speeds. The 55 mph limit serves as a standard for residential and rural areas, helping to maintain control and reduce speed-related incidents in these potentially hazardous conditions. Understanding these distinctions is crucial for making informed and safe driving choices.