What is the interstate speed limit in Arizona?

The interstate speed limit in Arizona varies depending on the specific interstate and the location within the state. Here are the general speed limits for different types of vehicles on interstates in Arizona:

- Passenger vehicles (cars, light trucks, motorcycles): The speed limit is typically 75 mph on rural interstates and 65 mph on urban interstates.

- Buses and recreational vehicles (RVs): The speed limit is typically 65 mph on rural and urban interstates.

- Commercial vehicles (trucks, tractor-trailers): The speed limit is typically 65 mph on rural interstates and 55 mph on urban interstates.

However, it's important to note that there can be variations and exceptions to these speed limits. For example, there may be lower speed limits in construction zones or areas with increased traffic congestion, and the speed limits may be adjusted based on safety considerations or other factors. Therefore, it's best to always follow the posted speed limit signs along the interstate for the specific section of road you are traveling on.